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diff --git a/graphics/bg_w0_s0_0.bmp b/graphics/bg_w0_s0_0.bmp
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diff --git a/graphics/spr_hover_button.bmp b/graphics/spr_hover_button.bmp
index 1b1513d..20afe2d 100644
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diff --git a/graphics_source/bg_w0_s0_0.tmx b/graphics_source/bg_w0_s0_0.tmx
index a9c6c39..41b4936 100644
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+727,731,731,731,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,731,731,731,731,731,731,731,731,731,731,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+728,731,731,731,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,81,81,81,731,731,731,731,731,731,731,731,731,731,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+729,731,731,731,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+730,731,731,731,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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+724,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,731,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+725,723,724,725,726,727,728,729,730,721,722,723,724,725,726,727,728,729,730,721,722,723,724,725,726,727,728,729,730,721,722,723,724,725,726,727,728,729,730,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
 </data>
  </layer>
  <group id="5" name="MUST DISABLE BEFORE EXPORT" visible="0">
@@ -270,10 +270,19 @@
    <object id="1" name="Player" x="57" y="980"/>
    <object id="3" name="bar" x="186" y="954"/>
    <object id="4" name="xor" x="254" y="927"/>
-   <object id="5" name="door1" x="115" y="857"/>
-   <object id="6" name="hoverBtn1" x="92" y="962"/>
-   <object id="7" name="pressBtn2" x="136" y="984"/>
-   <object id="8" name="shutter2" x="256" y="792"/>
+   <object id="5" name="door1" x="87" y="849"/>
+   <object id="6" name="hoverBtn1" x="167" y="849"/>
+   <object id="7" name="pressBtn3" x="136" y="984"/>
+   <object id="9" name="~shutter1" x="119" y="849"/>
+   <object id="10" name="shutter1" x="135" y="849"/>
+   <object id="11" name="~door1" x="55" y="849"/>
+   <object id="12" name="door2" x="87" y="792"/>
+   <object id="13" name="~shutter2" x="119" y="792"/>
+   <object id="14" name="shutter2" x="135" y="792"/>
+   <object id="15" name="~door2" x="55" y="792"/>
+   <object id="16" name="hoverBtn2" x="167" y="792"/>
+   <object id="17" name="shutter2" x="256" y="792"/>
+   <object id="18" name="hoverBtn0" x="92" y="962"/>
   </objectgroup>
  </group>
  <layer id="3" name="Collision Helper" width="128" height="128">
diff --git a/graphics_source/spr_hover_button.aseprite b/graphics_source/spr_hover_button.aseprite
index 9abcfed..4e1767f 100644
Binary files a/graphics_source/spr_hover_button.aseprite and b/graphics_source/spr_hover_button.aseprite differ
diff --git a/include/game_entity_Door.h b/include/game_entity_Door.h
index 229c78e..f3fe8dd 100644
--- a/include/game_entity_Door.h
+++ b/include/game_entity_Door.h
@@ -16,7 +16,7 @@ class Door final : public IOpenableEntity
      *
      * @param textNumber number which is shown above the door.
      */
-    Door(bn::fixed_point position, bool isOpened, int textNumber);
+    Door(bn::fixed_point position, bool isOpenedByDefault, int textNumber);
 
     Door(Door&& other) = delete;
     Door& operator=(Door&& other) = delete;
@@ -29,11 +29,18 @@ class Door final : public IOpenableEntity
 
     void Update() final;
 
-    void InitDoorOpenAction();
-    void InitDoorCloseAction();
+    /**
+     * @brief Toggle opened (also animates door)
+     *
+     * @return `true` if the door is opened
+     */
+    [[maybe_unused]] bool ToggleOpened() final;
 
 private:
     bn::optional<bn::sprite_animate_action<4>> action_;
+
+    void InitDoorOpenAction_();
+    void InitDoorCloseAction_();
 };
 
 } // namespace sym::game::entity
diff --git a/include/game_entity_HoverButton.h b/include/game_entity_HoverButton.h
index 2256d54..8ce4338 100644
--- a/include/game_entity_HoverButton.h
+++ b/include/game_entity_HoverButton.h
@@ -24,11 +24,21 @@ class HoverButton final : public IButtonEntity
 
     void Update() final;
 
-    void InitButtonOnAction();
-    void InitButtonOffAction();
+    [[nodiscard]] bool CanButtonBeToggled() final;
+    /**
+     * @brief Toggles button (and also animates it)
+     *
+     * `CanButtonBeToggled()` needs to be checked first before using this function.
+     *
+     * @return `true` if button is on
+     */
+    [[maybe_unused]] bool ToggleButtonOn() final;
 
 private:
     bn::optional<bn::sprite_animate_action<2>> action_;
+
+    void InitButtonOnAction_();
+    void InitButtonOffAction_();
 };
 
 } // namespace sym::game::entity
diff --git a/include/game_entity_IButtonEntity.h b/include/game_entity_IButtonEntity.h
index 6ec1883..1c36c94 100644
--- a/include/game_entity_IButtonEntity.h
+++ b/include/game_entity_IButtonEntity.h
@@ -20,8 +20,16 @@ class IButtonEntity : public INumberTextEntity
     IButtonEntity(const IButtonEntity& other) = delete;
     IButtonEntity& operator=(const IButtonEntity& other) = delete;
 
-    bool GetButtonOn() const;
-    void SetButtonOn(bool isButtonOn);
+    [[nodiscard]] bool GetButtonOn() const;
+    // void SetButtonOn(bool isButtonOn);
+    [[nodiscard]] virtual bool CanButtonBeToggled() = 0;
+    /**
+     * @brief `CanButtonBeToggled()` needs to be checked first before using this function.
+     * `IButtonEntity::ToggleButtonOn()` must be called somewhere in the Button implementation.
+     *
+     * @return `true` if button is on
+     */
+    [[maybe_unused]] virtual bool ToggleButtonOn() = 0;
 
 private:
     bool isButtonOn_;
diff --git a/include/game_entity_INumberTextEntity.h b/include/game_entity_INumberTextEntity.h
index 774b237..38ea240 100644
--- a/include/game_entity_INumberTextEntity.h
+++ b/include/game_entity_INumberTextEntity.h
@@ -24,7 +24,7 @@ class INumberTextEntity : public IEntity
 
     void SetCamera(const bn::camera_ptr& camera);
 
-private:
+protected:
     bn::optional<bn::sprite_ptr> numberSprite_;
     int textNumber_;
     bn::fixed_point relativeNumberTextPosition_;
diff --git a/include/game_entity_IOpenableEntity.h b/include/game_entity_IOpenableEntity.h
index 85c0ed8..57d5956 100644
--- a/include/game_entity_IOpenableEntity.h
+++ b/include/game_entity_IOpenableEntity.h
@@ -11,20 +11,29 @@ class IOpenableEntity : public INumberTextEntity
     virtual ~IOpenableEntity() = 0;
 
     IOpenableEntity(bn::fixed_point position, bn::fixed_rect relativeInteractRange, int textNumber,
-                    bn::fixed_point relativeNumberTextPosition, bool isOpened,
+                    bn::fixed_point relativeNumberTextPosition, bool isOpenedByDefault,
                     const bn::sprite_item* spriteItem = nullptr);
 
-    IOpenableEntity(IOpenableEntity&& other);
-    IOpenableEntity& operator=(IOpenableEntity&& other);
+    IOpenableEntity(IOpenableEntity&& other) = delete;
+    IOpenableEntity& operator=(IOpenableEntity&& other) = delete;
 
     IOpenableEntity(const IOpenableEntity& other) = delete;
     IOpenableEntity& operator=(const IOpenableEntity& other) = delete;
 
-    bool GetOpened() const;
-    void SetOpened(bool);
-    [[maybe_unused]] bool ToggleOpened();
+    void AllocateGraphicResource(int z_order) override;
 
-private:
+    [[nodiscard]] bool GetOpened() const;
+    // void SetOpened(bool);
+
+    /**
+     * @brief `IOpenableEntity::ToggleOpened()` must be called somewhere in the Openable implementation.
+     *
+     * @return `true` if it is opened
+     */
+    [[maybe_unused]] virtual bool ToggleOpened() = 0;
+
+protected:
+    const bool isOpenedByDefault_;
     bool isOpened_;
 };
 
diff --git a/include/game_entity_Player.h b/include/game_entity_Player.h
index b16399a..296f27d 100644
--- a/include/game_entity_Player.h
+++ b/include/game_entity_Player.h
@@ -2,7 +2,6 @@
 
 #include "game_entity_IGravityEntity.h"
 
-#include <bn_any.h>
 #include <bn_sprite_animate_actions.h>
 
 namespace sym::game::entity
@@ -30,15 +29,15 @@ class Player final : public IGravityEntity
     void InitMergeStartAction();
     void InitMergeEndAction();
 
-private:
-    static constexpr bn::fixed_rect RELATIVE_INTERACT_RANGE = {{0, 0}, {32, 32}};
-    static constexpr bn::fixed_rect RELATIVE_PHYSICS_COLLIDER = {{0, 0}, {26, 26}};
-    static constexpr bool IS_GRAVITY_ENABLED_BY_DEFAULT = true;
-    static constexpr bn::fixed GRAVITY_SCALE = 1;
-
-    static constexpr int IDLE_ACTION_WAIT_UPDATE = 30;
-    static constexpr int OTHER_ACTIONS_WAIT_UPDATE = 10;
+    [[nodiscard]] bn::fixed_rect GetLeftSymbolPickupRange() const;
+    [[nodiscard]] bn::fixed_rect GetRightSymbolPickupRange() const;
+    [[nodiscard]] bn::fixed_rect GetLeftButtonInteractRange() const;
+    [[nodiscard]] bn::fixed_rect GetRightButtonInteractRange() const;
+    [[nodiscard]] bn::fixed_point GetLeftSymbolPosition() const;
+    [[nodiscard]] bn::fixed_point GetRightSymbolPosition() const;
+    [[nodiscard]] bn::fixed_point GetMergeSymbolPosition() const;
 
+private:
     bn::optional<bn::sprite_animate_action<2>> action2_;
     bn::optional<bn::sprite_animate_action<3>> action3_;
     /**
@@ -49,6 +48,12 @@ class Player final : public IGravityEntity
      */
     int additionalWaitUpdateCount = -1;
 
+    /**
+     * @brief Updates action.
+     *
+     * @return `true` if action is done, otherwise `false`
+     */
+    bool UpdateAction_();
     void DestroyActions_();
 };
 
diff --git a/include/game_entity_PressureButton.h b/include/game_entity_PressureButton.h
index 3d35aab..9741e52 100644
--- a/include/game_entity_PressureButton.h
+++ b/include/game_entity_PressureButton.h
@@ -24,11 +24,21 @@ class PressureButton final : public IButtonEntity
 
     void Update() final;
 
-    void InitButtonOnAction();
-    void InitButtonOffAction();
+    [[nodiscard]] bool CanButtonBeToggled() final;
+    /**
+     * @brief Toggles button (and also animates it)
+     *
+     * `CanButtonBeToggled()` needs to be checked first before using this function.
+     *
+     * @return `true` if button is on
+     */
+    [[maybe_unused]] bool ToggleButtonOn() final;
 
 private:
     bn::optional<bn::sprite_animate_action<2>> action_;
+
+    void InitButtonOnAction_();
+    void InitButtonOffAction_();
 };
 
 } // namespace sym::game::entity
diff --git a/include/game_entity_Shutter.h b/include/game_entity_Shutter.h
index 2f2db8a..18cd785 100644
--- a/include/game_entity_Shutter.h
+++ b/include/game_entity_Shutter.h
@@ -16,7 +16,7 @@ class Shutter final : public IOpenableEntity
      *
      * @param textNumber number which is shown above the Shutter.
      */
-    Shutter(bn::fixed_point position, bool isOpened, int textNumber);
+    Shutter(bn::fixed_point position, bool isOpenedByDefault, int textNumber);
 
     Shutter(Shutter&& other) = delete;
     Shutter& operator=(Shutter&& other) = delete;
@@ -29,11 +29,18 @@ class Shutter final : public IOpenableEntity
 
     void Update() final;
 
-    void InitShutterOpenAction();
-    void InitShutterCloseAction();
+    /**
+     * @brief Toggle opened (also animates shutter)
+     *
+     * @return `true` if the shutter is opened
+     */
+    [[maybe_unused]] bool ToggleOpened() final;
 
 private:
     bn::optional<bn::sprite_animate_action<4>> action_;
+
+    void InitShutterOpenAction_();
+    void InitShutterCloseAction_();
 };
 
 } // namespace sym::game::entity
diff --git a/include/game_system_ButtonInteraction.h b/include/game_system_ButtonInteraction.h
new file mode 100644
index 0000000..86f833c
--- /dev/null
+++ b/include/game_system_ButtonInteraction.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include "game_system_ISystem.h"
+
+namespace sym::game::system
+{
+
+class ButtonInteraction final : public ISystem
+{
+public:
+    ButtonInteraction(scene::GameState& state);
+
+    void Update() final;
+
+private:
+    static constexpr int KEYPRESS_LASTING_UPDATE_COUNT = 5;
+    int lKeyLastingCount = -1;
+    int rKeyLastingCount = -1;
+
+    void HoverButtonPlayerInteract_();
+    void HoverButtonThrownSymbolInteract_();
+
+    void UpdateKeyLastingCount_();
+    bool IsLKeyPressLasts_() const;
+    bool IsRKeyPressLasts_() const;
+    void ResetLKeyPress_();
+    void ResetRKeyPress_();
+    void ToggleOpenedHoverButtonAssociatedOpenables_(int hoverButtonIdx);
+};
+
+} // namespace sym::game::system
diff --git a/include/game_system_ISystem.h b/include/game_system_ISystem.h
new file mode 100644
index 0000000..2351bcd
--- /dev/null
+++ b/include/game_system_ISystem.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include "scene_GameState.h"
+
+namespace sym::game::system
+{
+
+class ISystem
+{
+public:
+    virtual ~ISystem() = default;
+    ISystem(scene::GameState& state) : state_(state)
+    {
+    }
+
+    virtual void Update() = 0;
+
+protected:
+    scene::GameState& state_;
+};
+
+} // namespace sym::game::system
diff --git a/include/game_system_PlayerMovement.h b/include/game_system_PlayerMovement.h
new file mode 100644
index 0000000..36ce6ff
--- /dev/null
+++ b/include/game_system_PlayerMovement.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include "game_system_ISystem.h"
+
+namespace sym::game::system
+{
+
+class PlayerMovement final : public ISystem
+{
+public:
+    PlayerMovement(scene::GameState& state);
+
+    void Update() final;
+
+private:
+};
+
+} // namespace sym::game::system
diff --git a/include/scene_Game.h b/include/scene_Game.h
index 3c39cd9..c54e808 100644
--- a/include/scene_Game.h
+++ b/include/scene_Game.h
@@ -2,34 +2,18 @@
 
 #include "scene_IScene.h"
 
-#include <bn_affine_bg_ptr.h>
-#include <bn_array.h>
-#include <bn_camera_ptr.h>
-#include <bn_fixed_point.h>
-#include <bn_forward_list.h>
-#include <bn_memory.h>
-#include <bn_optional.h>
-#include <bn_span.h>
-#include <bn_vector.h>
-
-#include "effect_Transition.h"
-#include "game_Status.h"
-#include "game_entity_Door.h"
-#include "game_entity_HoverButton.h"
-#include "game_entity_Player.h"
-#include "game_entity_PressureButton.h"
-#include "game_entity_Shutter.h"
-#include "game_entity_Symbol.h"
-#include "game_stage_Id.h"
-#include "game_stage_StageInfo.h"
+#include "game_system_ButtonInteraction.h"
+#include "game_system_PlayerMovement.h"
+#include "scene_GameState.h"
 
 namespace sym::scene
 {
+using namespace game;
 
 class Game final : public IScene
 {
 public:
-    Game(game::Status& status);
+    Game(scene::Param& sceneParam);
     ~Game();
 
     [[nodiscard]] bn::optional<Type> Update() final;
@@ -38,36 +22,15 @@ class Game final : public IScene
     static constexpr int FADE_IN_UPDATE_COUNT = 30;
     static constexpr int FADE_OUT_UPDATE_COUNT = 30;
 
-    static constexpr int ZONE_MAX_COUNT = 8;
-    static constexpr int STAGE_SYMBOL_MAX_COUNT = 16;
-    static constexpr int ZONE_HOVER_BUTTON_MAX_COUNT = 4;
-    static constexpr int ZONE_PRESSURE_BUTTON_MAX_COUNT = 4;
-    static constexpr int ZONE_DOOR_MAX_COUNT = 4;
-    static constexpr int ZONE_SHUTTER_MAX_COUNT = 4;
-
-    game::Status& status_;
-    const game::stage::StageInfo& stageInfo_;
-
-    effect::Transition fadeIn_;
-    effect::Transition fadeOut_;
-
-    int currentZoneIdx_;
-    bn::affine_bg_ptr currentMapBg_;
-
-    bn::camera_ptr camera_;
-    bn::fixed_rect zoneBoundary_;
-
-    // Movable entities.
-    game::entity::Player player_;
-    bn::vector<bn::forward_list<game::entity::Symbol, STAGE_SYMBOL_MAX_COUNT>, ZONE_MAX_COUNT> symbolsOfZones_;
-    bn::array<bn::optional<game::entity::Symbol>, 2> symbolsInHands_;
+    /**
+     * @brief All member variables reside in here.
+     * to easily pass states by reference into Systems.
+     *
+     */
+    GameState state_;
 
-    // Fixed entities.
-    bn::vector<bn::vector<game::entity::Door, ZONE_DOOR_MAX_COUNT>, ZONE_MAX_COUNT> doorsOfZones_;
-    bn::vector<bn::vector<game::entity::Shutter, ZONE_SHUTTER_MAX_COUNT>, ZONE_MAX_COUNT> shuttersOfZones_;
-    bn::vector<bn::vector<game::entity::HoverButton, ZONE_HOVER_BUTTON_MAX_COUNT>, ZONE_MAX_COUNT> hoverButtonsOfZones_;
-    bn::vector<bn::vector<game::entity::PressureButton, ZONE_PRESSURE_BUTTON_MAX_COUNT>, ZONE_MAX_COUNT>
-        pressureButtonsOfZones_;
+    system::PlayerMovement playerMovement_;
+    system::ButtonInteraction buttonInteraction_;
 
     void SetCurrentZone_(int zoneIdx);
 };
diff --git a/include/scene_GameState.h b/include/scene_GameState.h
new file mode 100644
index 0000000..a2b3f73
--- /dev/null
+++ b/include/scene_GameState.h
@@ -0,0 +1,65 @@
+#pragma once
+
+#include <bn_affine_bg_ptr.h>
+#include <bn_forward_list.h>
+#include <bn_vector.h>
+
+#include "effect_Transition.h"
+#include "game_entity_Door.h"
+#include "game_entity_HoverButton.h"
+#include "game_entity_Player.h"
+#include "game_entity_PressureButton.h"
+#include "game_entity_Shutter.h"
+#include "game_stage_StageInfo.h"
+#include "scene_Param.h"
+
+namespace sym::scene
+{
+
+namespace
+{
+
+constexpr int ZONE_MAX_COUNT = 8;
+constexpr int STAGE_SYMBOL_MAX_COUNT = 16;
+constexpr int ZONE_HOVER_BUTTON_MAX_COUNT = 8;
+constexpr int ZONE_PRESSURE_BUTTON_MAX_COUNT = 8;
+constexpr int ZONE_DOOR_MAX_COUNT = 8;
+constexpr int ZONE_SHUTTER_MAX_COUNT = 8;
+
+} // namespace
+
+/**
+ * @brief All scene::Game member variables reside in here.
+ * to easily pass states by reference into Systems.
+ *
+ */
+struct GameState
+{
+    scene::Param& sceneParam_;
+    const game::stage::StageInfo& stageInfo;
+
+    effect::Transition fadeIn;
+    effect::Transition fadeOut;
+
+    int currentZoneIdx;
+    bn::affine_bg_ptr currentMapBg;
+
+    bn::camera_ptr camera;
+    bn::fixed_rect zoneBoundary;
+
+    // Movable entities.
+    game::entity::Player player;
+    bn::vector<bn::forward_list<game::entity::Symbol, STAGE_SYMBOL_MAX_COUNT>, ZONE_MAX_COUNT> symbolsOfZones;
+    bn::array<bn::optional<game::entity::Symbol>, 2> symbolsInHands;
+
+    // Fixed entities.
+    bn::vector<bn::vector<game::entity::Door, ZONE_DOOR_MAX_COUNT>, ZONE_MAX_COUNT> doorsOfZones;
+    bn::vector<bn::vector<game::entity::Shutter, ZONE_SHUTTER_MAX_COUNT>, ZONE_MAX_COUNT> shuttersOfZones;
+    bn::vector<bn::vector<game::entity::HoverButton, ZONE_HOVER_BUTTON_MAX_COUNT>, ZONE_MAX_COUNT> hoverButtonsOfZones;
+    bn::vector<bn::vector<game::entity::PressureButton, ZONE_PRESSURE_BUTTON_MAX_COUNT>, ZONE_MAX_COUNT>
+        pressureButtonsOfZones;
+
+    bool isMenuPopup;
+};
+
+} // namespace sym::scene
diff --git a/include/scene_IScene.h b/include/scene_IScene.h
index 100b407..ea92891 100644
--- a/include/scene_IScene.h
+++ b/include/scene_IScene.h
@@ -2,6 +2,7 @@
 
 #include <bn_optional.h>
 
+#include "scene_Param.h"
 #include "scene_Type.h"
 
 namespace sym::scene
@@ -11,10 +12,14 @@ class IScene
 {
 public:
     virtual ~IScene() = default;
+    IScene(scene::Param& sceneParam) : sceneParam_(sceneParam)
+    {
+    }
+
     [[nodiscard]] virtual bn::optional<Type> Update() = 0;
 
 protected:
-    IScene() = default;
+    scene::Param& sceneParam_;
 };
 
 } // namespace sym::scene
diff --git a/include/game_Status.h b/include/scene_Param.h
similarity index 82%
rename from include/game_Status.h
rename to include/scene_Param.h
index 6ad7b41..ae53da0 100644
--- a/include/game_Status.h
+++ b/include/scene_Param.h
@@ -2,10 +2,10 @@
 
 #include "game_stage_Id.h"
 
-namespace sym::game
+namespace sym::scene
 {
 
-class Status
+class Param
 {
 public:
     void SetCurrentStage(game::stage::Id stage)
@@ -21,4 +21,4 @@ class Status
     game::stage::Id currentStage_;
 };
 
-} // namespace sym::game
+} // namespace sym::scene
diff --git a/include/scene_Splash.h b/include/scene_Splash.h
index aaef73c..cdad617 100644
--- a/include/scene_Splash.h
+++ b/include/scene_Splash.h
@@ -14,7 +14,7 @@ namespace sym::scene
 class Splash final : public IScene
 {
 public:
-    Splash();
+    Splash(scene::Param& sceneParam);
     ~Splash();
     [[nodiscard]] bn::optional<Type> Update() final;
 
diff --git a/include/scene_Title.h b/include/scene_Title.h
index b287ae2..42d71d5 100644
--- a/include/scene_Title.h
+++ b/include/scene_Title.h
@@ -20,7 +20,7 @@ namespace sym::scene
 class Title final : public IScene
 {
 public:
-    Title();
+    Title(scene::Param& sceneParam);
     ~Title();
     [[nodiscard]] bn::optional<Type> Update() final;
 
diff --git a/license/sfx_toggle_button.txt b/license/sfx_toggle_button.txt
new file mode 100644
index 0000000..c062f90
--- /dev/null
+++ b/license/sfx_toggle_button.txt
@@ -0,0 +1,4 @@
+Sound name : button
+Made by : Leszek_Szary
+Link : https://freesound.org/people/Leszek_Szary/sounds/171521/
+License : CC0 1.0 (https://creativecommons.org/publicdomain/zero/1.0/)
diff --git a/src/game_entity_Door.cpp b/src/game_entity_Door.cpp
index 72628a6..7b61e3b 100644
--- a/src/game_entity_Door.cpp
+++ b/src/game_entity_Door.cpp
@@ -28,8 +28,8 @@ constexpr int CLOSED_GRAPHICS_INDEX = 0;
 
 } // namespace
 
-Door::Door(bn::fixed_point position, bool isOpened, int textNumber)
-    : IOpenableEntity(position, RELATIVE_INTERACT_RANGE, textNumber, RELATIVE_NUMBER_TEXT_POS, isOpened,
+Door::Door(bn::fixed_point position, bool isOpenedByDefault, int textNumber)
+    : IOpenableEntity(position, RELATIVE_INTERACT_RANGE, textNumber, RELATIVE_NUMBER_TEXT_POS, isOpenedByDefault,
                       &bn::sprite_items::spr_door)
 {
 }
@@ -54,14 +54,25 @@ void Door::Update()
         action_->update();
 }
 
-void Door::InitDoorOpenAction()
+bool Door::ToggleOpened()
+{
+    const bool isOpenedBefore = GetOpened();
+    IOpenableEntity::ToggleOpened();
+    if (isOpenedBefore)
+        InitDoorCloseAction_();
+    else
+        InitDoorOpenAction_();
+    return !isOpenedBefore;
+}
+
+void Door::InitDoorOpenAction_()
 {
     BN_ASSERT(sprite_, "Door action cannot be init without allocating graphics!");
     action_ = bn::create_sprite_animate_action_once(*sprite_, WAIT_UPDATES, bn::sprite_items::spr_door.tiles_item(), 0,
                                                     1, 2, 3);
 }
 
-void Door::InitDoorCloseAction()
+void Door::InitDoorCloseAction_()
 {
     BN_ASSERT(sprite_, "Door action cannot be init without allocating graphics!");
     action_ = bn::create_sprite_animate_action_once(*sprite_, WAIT_UPDATES, bn::sprite_items::spr_door.tiles_item(), 3,
diff --git a/src/game_entity_HoverButton.cpp b/src/game_entity_HoverButton.cpp
index f1e4aa4..3dd34ae 100644
--- a/src/game_entity_HoverButton.cpp
+++ b/src/game_entity_HoverButton.cpp
@@ -52,14 +52,30 @@ void HoverButton::Update()
         action_->update();
 }
 
-void HoverButton::InitButtonOnAction()
+bool HoverButton::CanButtonBeToggled()
+{
+    return !action_ || action_->done();
+}
+
+bool HoverButton::ToggleButtonOn()
+{
+    const bool isButtonOnBefore = GetButtonOn();
+    IButtonEntity::ToggleButtonOn();
+    if (isButtonOnBefore)
+        InitButtonOffAction_();
+    else
+        InitButtonOnAction_();
+    return !isButtonOnBefore;
+}
+
+void HoverButton::InitButtonOnAction_()
 {
     BN_ASSERT(sprite_, "HoverButton action cannot be init without allocating graphics!");
     action_ = bn::create_sprite_animate_action_once(*sprite_, WAIT_UPDATES,
                                                     bn::sprite_items::spr_hover_button.tiles_item(), 2, 3);
 }
 
-void HoverButton::InitButtonOffAction()
+void HoverButton::InitButtonOffAction_()
 {
     BN_ASSERT(sprite_, "HoverButton action cannot be init without allocating graphics!");
     action_ = bn::create_sprite_animate_action_once(*sprite_, WAIT_UPDATES,
diff --git a/src/game_entity_IButtonEntity.cpp b/src/game_entity_IButtonEntity.cpp
index 0b336ed..71b526f 100644
--- a/src/game_entity_IButtonEntity.cpp
+++ b/src/game_entity_IButtonEntity.cpp
@@ -1,5 +1,7 @@
 #include "game_entity_IButtonEntity.h"
 
+#include <bn_assert.h>
+
 namespace sym::game::entity
 {
 
@@ -30,9 +32,15 @@ bool IButtonEntity::GetButtonOn() const
     return isButtonOn_;
 }
 
-void IButtonEntity::SetButtonOn(bool isButtonOn)
+// void IButtonEntity::SetButtonOn(bool isButtonOn)
+// {
+//     isButtonOn_ = isButtonOn;
+// }
+
+bool IButtonEntity::ToggleButtonOn()
 {
-    isButtonOn_ = isButtonOn;
+    BN_ASSERT(CanButtonBeToggled(), "Button can't be toggled when action is not done");
+    return isButtonOn_ = !isButtonOn_;
 }
 
 } // namespace sym::game::entity
diff --git a/src/game_entity_IOpenableEntity.cpp b/src/game_entity_IOpenableEntity.cpp
index 9c2a171..361dbfd 100644
--- a/src/game_entity_IOpenableEntity.cpp
+++ b/src/game_entity_IOpenableEntity.cpp
@@ -6,23 +6,21 @@ namespace sym::game::entity
 IOpenableEntity::~IOpenableEntity() = default;
 
 IOpenableEntity::IOpenableEntity(bn::fixed_point position, bn::fixed_rect relativeInteractRange, int textNumber,
-                                 bn::fixed_point relativeNumberTextPosition, bool isOpened,
+                                 bn::fixed_point relativeNumberTextPosition, bool isOpenedByDefault,
                                  const bn::sprite_item* spriteItem)
     : INumberTextEntity(position, relativeInteractRange, textNumber, relativeNumberTextPosition, spriteItem),
-      isOpened_(isOpened)
+      isOpenedByDefault_(isOpenedByDefault), isOpened_(isOpenedByDefault)
 {
 }
 
-IOpenableEntity::IOpenableEntity(IOpenableEntity&& other)
-    : INumberTextEntity(bn::move(other)), isOpened_(other.isOpened_)
+void IOpenableEntity::AllocateGraphicResource(int z_order)
 {
-}
-
-IOpenableEntity& IOpenableEntity::operator=(IOpenableEntity&& other)
-{
-    INumberTextEntity::operator=(bn::move(other));
-    isOpened_ = other.isOpened_;
-    return *this;
+    INumberTextEntity::AllocateGraphicResource(z_order);
+    if (isOpenedByDefault_)
+    {
+        numberSprite_->set_horizontal_flip(true);
+        numberSprite_->set_vertical_flip(true);
+    }
 }
 
 bool IOpenableEntity::GetOpened() const
@@ -30,10 +28,10 @@ bool IOpenableEntity::GetOpened() const
     return isOpened_;
 }
 
-void IOpenableEntity::SetOpened(bool isOpened)
-{
-    isOpened_ = isOpened;
-}
+// void IOpenableEntity::SetOpened(bool isOpened)
+// {
+//     isOpened_ = isOpened;
+// }
 
 bool IOpenableEntity::ToggleOpened()
 {
diff --git a/src/game_entity_Player.cpp b/src/game_entity_Player.cpp
index 42a7304..b61a646 100644
--- a/src/game_entity_Player.cpp
+++ b/src/game_entity_Player.cpp
@@ -4,10 +4,39 @@
 #include <bn_sprite_animate_actions.h>
 
 #include "bn_sprite_items_spr_ingame_protagonist_star.h"
+#include "helper_rect.h"
 
 namespace sym::game::entity
 {
 
+namespace
+{
+
+constexpr int SPRITE_WIDTH = bn::sprite_items::spr_ingame_protagonist_star.shape_size().width();
+constexpr int SPRITE_HEIGHT = bn::sprite_items::spr_ingame_protagonist_star.shape_size().height();
+
+constexpr bn::fixed_rect RELATIVE_INTERACT_RANGE = {{0, 0}, {32, 32}};
+constexpr bn::fixed_rect RELATIVE_LEFT_SYMBOL_PICKUP_RANGE =
+    helper::rect::MakeFixedRectByTopLeftAndSize({0 - SPRITE_WIDTH / 2, 0 - SPRITE_HEIGHT / 2}, {23, 32});
+constexpr bn::fixed_rect RELATIVE_RIGHT_SYMBOL_PICKUP_RANGE =
+    helper::rect::MakeFixedRectByTopLeftAndSize({9 - SPRITE_WIDTH / 2, 0 - SPRITE_HEIGHT / 2}, {23, 32});
+constexpr bn::fixed_rect RELATIVE_LEFT_BUTTON_INTERACT_RANGE =
+    helper::rect::MakeFixedRectByTopLeftAndSize({2 - SPRITE_WIDTH / 2, 9 - SPRITE_HEIGHT / 2}, {9, 11});
+constexpr bn::fixed_rect RELATIVE_RIGHT_BUTTON_INTERACT_RANGE =
+    helper::rect::MakeFixedRectByTopLeftAndSize({21 - SPRITE_WIDTH / 2, 9 - SPRITE_HEIGHT / 2}, {9, 11});
+constexpr bn::fixed_point RELATIVE_LEFT_SYMBOL_POS = {-12, 2.5};
+constexpr bn::fixed_point RELATIVE_RIGHT_SYMBOL_POS = {12, 2.5};
+constexpr bn::fixed_point RELATIVE_MERGE_SYMBOL_POS = {0, -21};
+
+constexpr bn::fixed_rect RELATIVE_PHYSICS_COLLIDER = {{0, 0}, {26, 26}};
+constexpr bool IS_GRAVITY_ENABLED_BY_DEFAULT = true;
+constexpr bn::fixed GRAVITY_SCALE = 1;
+
+constexpr int IDLE_ACTION_WAIT_UPDATE = 30;
+constexpr int OTHER_ACTIONS_WAIT_UPDATE = 10;
+
+} // namespace
+
 Player::Player(bn::fixed_point position)
     : IGravityEntity(position, RELATIVE_INTERACT_RANGE, RELATIVE_PHYSICS_COLLIDER, IS_GRAVITY_ENABLED_BY_DEFAULT,
                      GRAVITY_SCALE, &bn::sprite_items::spr_ingame_protagonist_star)
@@ -24,23 +53,7 @@ void Player::Update()
 {
     IGravityEntity::Update();
 
-    bool isActionDone = true;
-    if (action2_)
-    {
-        if (!action2_->done())
-        {
-            action2_->update();
-            isActionDone = false;
-        }
-    }
-    else if (action3_)
-    {
-        if (!action3_->done())
-        {
-            action3_->update();
-            isActionDone = false;
-        }
-    }
+    bool isActionDone = UpdateAction_();
 
     if (isActionDone && additionalWaitUpdateCount >= 0)
     {
@@ -101,6 +114,67 @@ void Player::InitMergeEndAction()
     additionalWaitUpdateCount = OTHER_ACTIONS_WAIT_UPDATE;
 }
 
+bn::fixed_rect Player::GetLeftSymbolPickupRange() const
+{
+    using helper::rect::operator+;
+    return position_ + RELATIVE_LEFT_SYMBOL_PICKUP_RANGE;
+}
+
+bn::fixed_rect Player::GetRightSymbolPickupRange() const
+{
+    using helper::rect::operator+;
+    return position_ + RELATIVE_RIGHT_SYMBOL_PICKUP_RANGE;
+}
+
+bn::fixed_rect Player::GetLeftButtonInteractRange() const
+{
+    using helper::rect::operator+;
+    return position_ + RELATIVE_LEFT_BUTTON_INTERACT_RANGE;
+}
+
+bn::fixed_rect Player::GetRightButtonInteractRange() const
+{
+    using helper::rect::operator+;
+    return position_ + RELATIVE_RIGHT_BUTTON_INTERACT_RANGE;
+}
+
+bn::fixed_point Player::GetLeftSymbolPosition() const
+{
+    return position_ + RELATIVE_LEFT_SYMBOL_POS;
+}
+
+bn::fixed_point Player::GetRightSymbolPosition() const
+{
+    return position_ + RELATIVE_RIGHT_SYMBOL_POS;
+}
+
+bn::fixed_point Player::GetMergeSymbolPosition() const
+{
+    return position_ + RELATIVE_MERGE_SYMBOL_POS;
+}
+
+bool Player::UpdateAction_()
+{
+    bool isActionDone = true;
+    if (action2_)
+    {
+        if (!action2_->done())
+        {
+            action2_->update();
+            isActionDone = false;
+        }
+    }
+    else if (action3_)
+    {
+        if (!action3_->done())
+        {
+            action3_->update();
+            isActionDone = false;
+        }
+    }
+    return isActionDone;
+}
+
 void Player::DestroyActions_()
 {
     additionalWaitUpdateCount = -1;
diff --git a/src/game_entity_PressureButton.cpp b/src/game_entity_PressureButton.cpp
index 2f545e2..89b4abb 100644
--- a/src/game_entity_PressureButton.cpp
+++ b/src/game_entity_PressureButton.cpp
@@ -52,14 +52,30 @@ void PressureButton::Update()
         action_->update();
 }
 
-void PressureButton::InitButtonOnAction()
+bool PressureButton::CanButtonBeToggled()
+{
+    return !action_ || action_->done();
+}
+
+bool PressureButton::ToggleButtonOn()
+{
+    const bool isButtonOnBefore = GetButtonOn();
+    IButtonEntity::ToggleButtonOn();
+    if (isButtonOnBefore)
+        InitButtonOffAction_();
+    else
+        InitButtonOnAction_();
+    return !isButtonOnBefore;
+}
+
+void PressureButton::InitButtonOnAction_()
 {
     BN_ASSERT(sprite_, "PressureButton action cannot be init without allocating graphics!");
     action_ = bn::create_sprite_animate_action_once(*sprite_, WAIT_UPDATES,
                                                     bn::sprite_items::spr_pressure_button.tiles_item(), 1, 2);
 }
 
-void PressureButton::InitButtonOffAction()
+void PressureButton::InitButtonOffAction_()
 {
     BN_ASSERT(sprite_, "PressureButton action cannot be init without allocating graphics!");
     action_ = bn::create_sprite_animate_action_once(*sprite_, WAIT_UPDATES,
diff --git a/src/game_entity_Shutter.cpp b/src/game_entity_Shutter.cpp
index 58e42a9..de2022b 100644
--- a/src/game_entity_Shutter.cpp
+++ b/src/game_entity_Shutter.cpp
@@ -28,8 +28,8 @@ constexpr int CLOSED_GRAPHICS_INDEX = 0;
 
 } // namespace
 
-Shutter::Shutter(bn::fixed_point position, bool isOpened, int textNumber)
-    : IOpenableEntity(position, RELATIVE_INTERACT_RANGE, textNumber, RELATIVE_NUMBER_TEXT_POS, isOpened,
+Shutter::Shutter(bn::fixed_point position, bool isOpenedByDefault, int textNumber)
+    : IOpenableEntity(position, RELATIVE_INTERACT_RANGE, textNumber, RELATIVE_NUMBER_TEXT_POS, isOpenedByDefault,
                       &bn::sprite_items::spr_shutter)
 {
 }
@@ -54,14 +54,25 @@ void Shutter::Update()
         action_->update();
 }
 
-void Shutter::InitShutterOpenAction()
+bool Shutter::ToggleOpened()
+{
+    const bool isOpenedBefore = GetOpened();
+    IOpenableEntity::ToggleOpened();
+    if (isOpenedBefore)
+        InitShutterCloseAction_();
+    else
+        InitShutterOpenAction_();
+    return !isOpenedBefore;
+}
+
+void Shutter::InitShutterOpenAction_()
 {
     BN_ASSERT(sprite_, "Shutter action cannot be init without allocating graphics!");
     action_ = bn::create_sprite_animate_action_once(*sprite_, WAIT_UPDATES, bn::sprite_items::spr_shutter.tiles_item(),
                                                     0, 1, 2, 3);
 }
 
-void Shutter::InitShutterCloseAction()
+void Shutter::InitShutterCloseAction_()
 {
     BN_ASSERT(sprite_, "Shutter action cannot be init without allocating graphics!");
     action_ = bn::create_sprite_animate_action_once(*sprite_, WAIT_UPDATES, bn::sprite_items::spr_shutter.tiles_item(),
diff --git a/src/game_stage_W0_S0.cpp b/src/game_stage_W0_S0.cpp
index a73d3b1..efaed75 100644
--- a/src/game_stage_W0_S0.cpp
+++ b/src/game_stage_W0_S0.cpp
@@ -25,19 +25,28 @@ constexpr ZoneInfo::SymbolInfo Z0_symbolInfos_[] = {
 };
 
 constexpr ZoneInfo::DoorInfo Z0_doorInfos_[] = {
-    {{115 - MAP_DIMENSIONS[0].width() / 2, 857 - MAP_DIMENSIONS[0].height() / 2}, false, -1, -1, 1},
+    {{87 - MAP_DIMENSIONS[0].width() / 2, 849 - MAP_DIMENSIONS[0].height() / 2}, false, -1, -1, 1},
+    {{55 - MAP_DIMENSIONS[0].width() / 2, 849 - MAP_DIMENSIONS[0].height() / 2}, true, -1, -1, 1},
+    {{87 - MAP_DIMENSIONS[0].width() / 2, 792 - MAP_DIMENSIONS[0].height() / 2}, false, -1, -1, 2},
+    {{55 - MAP_DIMENSIONS[0].width() / 2, 792 - MAP_DIMENSIONS[0].height() / 2}, true, -1, -1, 2},
 };
 
 constexpr ZoneInfo::ShutterInfo Z0_shutterInfos_[] = {
-    {{256 - MAP_DIMENSIONS[0].width() / 2, 792 - MAP_DIMENSIONS[0].height() / 2}, false, 2},
+    {{256 - MAP_DIMENSIONS[0].width() / 2, 792 - MAP_DIMENSIONS[0].height() / 2}, false, 0},
+    {{135 - MAP_DIMENSIONS[0].width() / 2, 849 - MAP_DIMENSIONS[0].height() / 2}, false, 1},
+    {{119 - MAP_DIMENSIONS[0].width() / 2, 849 - MAP_DIMENSIONS[0].height() / 2}, true, 1},
+    {{135 - MAP_DIMENSIONS[0].width() / 2, 792 - MAP_DIMENSIONS[0].height() / 2}, false, 2},
+    {{119 - MAP_DIMENSIONS[0].width() / 2, 792 - MAP_DIMENSIONS[0].height() / 2}, true, 2},
 };
 
 constexpr ZoneInfo::ButtonInfo Z0_hoverButtonInfos_[] = {
-    {{92 - MAP_DIMENSIONS[0].width() / 2, 962 - MAP_DIMENSIONS[0].height() / 2}, false, 1},
+    {{92 - MAP_DIMENSIONS[0].width() / 2, 962 - MAP_DIMENSIONS[0].height() / 2}, false, 0},
+    {{167 - MAP_DIMENSIONS[0].width() / 2, 849 - MAP_DIMENSIONS[0].height() / 2}, false, 1},
+    {{167 - MAP_DIMENSIONS[0].width() / 2, 792 - MAP_DIMENSIONS[0].height() / 2}, false, 2},
 };
 
 constexpr ZoneInfo::ButtonInfo Z0_pressureButtonInfos_[] = {
-    {{136 - MAP_DIMENSIONS[0].width() / 2, 984 - MAP_DIMENSIONS[0].height() / 2}, false, 2},
+    {{136 - MAP_DIMENSIONS[0].width() / 2, 984 - MAP_DIMENSIONS[0].height() / 2}, false, 3},
 };
 
 constexpr ZoneInfo::EntranceInfo Z0_entranceInfos_[] = {
diff --git a/src/game_system_ButtonInteraction.cpp b/src/game_system_ButtonInteraction.cpp
new file mode 100644
index 0000000..5318b9b
--- /dev/null
+++ b/src/game_system_ButtonInteraction.cpp
@@ -0,0 +1,121 @@
+#include "game_system_ButtonInteraction.h"
+
+#include <bn_fixed_rect.h>
+#include <bn_keypad.h>
+
+#include "bn_sound_items.h"
+
+namespace sym::game::system
+{
+
+ButtonInteraction::ButtonInteraction(scene::GameState& state) : ISystem(state)
+{
+}
+
+void ButtonInteraction::Update()
+{
+    UpdateKeyLastingCount_();
+
+    HoverButtonPlayerInteract_();
+    HoverButtonThrownSymbolInteract_();
+}
+
+void ButtonInteraction::HoverButtonPlayerInteract_()
+{
+    if (IsLKeyPressLasts_())
+    {
+        const bn::fixed_rect leftHand = state_.player.GetLeftButtonInteractRange();
+
+        for (int i = 0; i < state_.hoverButtonsOfZones[state_.currentZoneIdx].size(); ++i)
+        {
+            auto& hoverButton = state_.hoverButtonsOfZones[state_.currentZoneIdx][i];
+            if (!hoverButton.CanButtonBeToggled())
+                continue;
+
+            if (leftHand.intersects(hoverButton.GetInteractRange()))
+            {
+                hoverButton.ToggleButtonOn();
+                ToggleOpenedHoverButtonAssociatedOpenables_(i);
+                bn::sound_items::sfx_toggle_button.play();
+                ResetLKeyPress_();
+                break;
+            }
+        }
+    }
+
+    if (IsRKeyPressLasts_())
+    {
+        const bn::fixed_rect rightHand = state_.player.GetRightButtonInteractRange();
+        for (int i = 0; i < state_.hoverButtonsOfZones[state_.currentZoneIdx].size(); ++i)
+        {
+            auto& hoverButton = state_.hoverButtonsOfZones[state_.currentZoneIdx][i];
+            if (!hoverButton.CanButtonBeToggled())
+                continue;
+
+            if (rightHand.intersects(hoverButton.GetInteractRange()))
+            {
+                hoverButton.ToggleButtonOn();
+                ToggleOpenedHoverButtonAssociatedOpenables_(i);
+                bn::sound_items::sfx_toggle_button.play();
+                ResetRKeyPress_();
+                break;
+            }
+        }
+    }
+}
+
+void ButtonInteraction::HoverButtonThrownSymbolInteract_()
+{
+    // TODO
+}
+
+void ButtonInteraction::UpdateKeyLastingCount_()
+{
+    if (lKeyLastingCount >= 0)
+        --lKeyLastingCount;
+    if (rKeyLastingCount >= 0)
+        --rKeyLastingCount;
+    if (bn::keypad::l_pressed())
+        lKeyLastingCount = KEYPRESS_LASTING_UPDATE_COUNT;
+    if (bn::keypad::r_pressed())
+        rKeyLastingCount = KEYPRESS_LASTING_UPDATE_COUNT;
+}
+
+bool ButtonInteraction::IsLKeyPressLasts_() const
+{
+    return lKeyLastingCount >= 0;
+}
+
+bool ButtonInteraction::IsRKeyPressLasts_() const
+{
+    return rKeyLastingCount >= 0;
+}
+
+void ButtonInteraction::ResetLKeyPress_()
+{
+    lKeyLastingCount = -1;
+}
+
+void ButtonInteraction::ResetRKeyPress_()
+{
+    rKeyLastingCount = -1;
+}
+
+void ButtonInteraction::ToggleOpenedHoverButtonAssociatedOpenables_(int hoverButtonIdx)
+{
+    const auto& zoneInfo = state_.stageInfo.zoneInfos[state_.currentZoneIdx];
+    const int hoverButtonTextNum = zoneInfo.hoverButtons[hoverButtonIdx].textSpriteNumber;
+
+    for (int i = 0; i < state_.doorsOfZones[state_.currentZoneIdx].size(); ++i)
+    {
+        if (hoverButtonTextNum == zoneInfo.doors[i].textSpriteNumber)
+            state_.doorsOfZones[state_.currentZoneIdx][i].ToggleOpened();
+    }
+    for (int i = 0; i < state_.shuttersOfZones[state_.currentZoneIdx].size(); ++i)
+    {
+        if (hoverButtonTextNum == zoneInfo.shutters[i].textSpriteNumber)
+            state_.shuttersOfZones[state_.currentZoneIdx][i].ToggleOpened();
+    }
+}
+
+} // namespace sym::game::system
diff --git a/src/game_system_PlayerMovement.cpp b/src/game_system_PlayerMovement.cpp
new file mode 100644
index 0000000..7b73b4a
--- /dev/null
+++ b/src/game_system_PlayerMovement.cpp
@@ -0,0 +1,33 @@
+#include "game_system_PlayerMovement.h"
+
+#include <bn_keypad.h>
+
+namespace sym::game::system
+{
+
+PlayerMovement::PlayerMovement(scene::GameState& state) : ISystem(state)
+{
+}
+
+void PlayerMovement::Update()
+{
+    // Move player
+    if (bn::keypad::up_held())
+    {
+        state_.player.SetY(state_.player.GetY() - 3);
+    }
+    else if (bn::keypad::down_held())
+    {
+        state_.player.SetY(state_.player.GetY() + 3);
+    }
+    if (bn::keypad::left_held())
+    {
+        state_.player.SetX(state_.player.GetX() - 3);
+    }
+    else if (bn::keypad::right_held())
+    {
+        state_.player.SetX(state_.player.GetX() + 3);
+    }
+}
+
+} // namespace sym::game::system
diff --git a/src/main.cpp b/src/main.cpp
index 99c9484..6a3a441 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -20,11 +20,10 @@
 #include "global.h"
 
 #include "scene_Game.h"
+#include "scene_Param.h"
 #include "scene_Splash.h"
 #include "scene_Title.h"
 
-#include "game_Status.h"
-
 using namespace sym;
 
 int main()
@@ -33,10 +32,10 @@ int main()
     sym::global::setting::Init();
     bn::bg_palettes::set_transparent_color(constant::TRANSPARENT_BG_COLOR);
 
-    game::Status status;
+    scene::Param sceneParam;
     // Test
     // bn::unique_ptr<scene::IScene> scene(new scene::Splash);
-    bn::unique_ptr<scene::IScene> scene(new scene::Game(status));
+    bn::unique_ptr<scene::IScene> scene(new scene::Game(sceneParam));
     bn::optional<scene::Type> nextScene;
 
 #ifndef NDEBUG
@@ -104,11 +103,11 @@ int main()
             {
             case scene::Type::SPLASH:
                 scene.reset();
-                scene.reset(new scene::Splash);
+                scene.reset(new scene::Splash(sceneParam));
                 break;
             case scene::Type::TITLE:
                 scene.reset();
-                scene.reset(new scene::Title);
+                scene.reset(new scene::Title(sceneParam));
                 break;
             // TODO: Add other scenes
             // case SceneType::GAME:
diff --git a/src/scene_Game.cpp b/src/scene_Game.cpp
index df5a214..8f25f9d 100644
--- a/src/scene_Game.cpp
+++ b/src/scene_Game.cpp
@@ -43,85 +43,100 @@ constexpr int BUTTON_Z_ORDER = 5;
 
 using namespace effect;
 
-Game::Game(game::Status& status)
-    : status_(status), stageInfo_(GetStageInfo(status.GetCurrentStage())),
-      fadeIn_(Transition::Types::FADE | Transition::Types::BG_MOSAIC | effect::Transition::Types::SPRITE_MOSAIC,
-              Transition::Direction::IN, FADE_IN_UPDATE_COUNT),
-      fadeOut_(Transition::Types::FADE | Transition::Types::BG_MOSAIC | effect::Transition::Types::SPRITE_MOSAIC,
-               Transition::Direction::OUT, FADE_OUT_UPDATE_COUNT),
-      currentMapBg_(stageInfo_.zoneInfos[0].mapBg.create_bg({0, 0})), camera_(bn::camera_ptr::create(0, 0)),
-      player_({0, 0})
+Game::Game(scene::Param& sceneParam)
+    : IScene(sceneParam),
+      state_{
+          sceneParam,
+          GetStageInfo(sceneParam.GetCurrentStage()),
+          {Transition::Types::FADE | Transition::Types::BG_MOSAIC | effect::Transition::Types::SPRITE_MOSAIC,
+           Transition::Direction::IN, FADE_IN_UPDATE_COUNT},
+          {Transition::Types::FADE | Transition::Types::BG_MOSAIC | effect::Transition::Types::SPRITE_MOSAIC,
+           Transition::Direction::OUT, FADE_OUT_UPDATE_COUNT},
+          0,
+          state_.stageInfo.zoneInfos[0].mapBg.create_bg({0, 0}),
+          bn::camera_ptr::create(0, 0),
+          helper::tilemap::ConvertIndexRectToPositionRect(
+              state_.stageInfo.zoneInfos[state_.currentZoneIdx].zoneBoundary),
+          bn::fixed_point{0, 0},
+          {},
+          {},
+          {},
+          {},
+          {},
+          {},
+          true,
+      },
+      playerMovement_(state_), buttonInteraction_(state_)
 
 {
-    currentZoneIdx_ = 0;
-    currentMapBg_.set_wrapping_enabled(false);
-    currentMapBg_.set_camera(camera_);
-    zoneBoundary_ = helper::tilemap::ConvertIndexRectToPositionRect(stageInfo_.zoneInfos[currentZoneIdx_].zoneBoundary);
+    state_.currentMapBg.set_wrapping_enabled(false);
+    state_.currentMapBg.set_camera(state_.camera);
 
     // Resize vectors according to zone count
-    const int zoneCount = stageInfo_.zoneInfos.size();
-    symbolsOfZones_.resize(zoneCount);
-    doorsOfZones_.resize(zoneCount);
-    hoverButtonsOfZones_.resize(zoneCount);
-    pressureButtonsOfZones_.resize(zoneCount);
-    shuttersOfZones_.resize(zoneCount);
+    const int zoneCount = state_.stageInfo.zoneInfos.size();
+    state_.symbolsOfZones.resize(zoneCount);
+    state_.doorsOfZones.resize(zoneCount);
+    state_.hoverButtonsOfZones.resize(zoneCount);
+    state_.pressureButtonsOfZones.resize(zoneCount);
+    state_.shuttersOfZones.resize(zoneCount);
 
     // Initialize player and camera
-    const bn::fixed_point& playerPosition = stageInfo_.zoneInfos[0].entrances[0].position;
-    player_.SetPosition(playerPosition);
-    camera_.set_position(playerPosition);
+    const bn::fixed_point& playerPosition = state_.stageInfo.zoneInfos[0].entrances[0].position;
+    state_.player.SetPosition(playerPosition);
+    state_.camera.set_position(playerPosition);
 
     // Load and initialize Entities in zones using ZoneInfo
     for (int i = 0; i < zoneCount; ++i)
     {
-        const auto& zoneInfo = stageInfo_.zoneInfos[i];
+        const auto& zoneInfo = state_.stageInfo.zoneInfos[i];
 
         for (const auto& symbolInfo : zoneInfo.symbols)
-            symbolsOfZones_[i].emplace_front(symbolInfo.position, symbolInfo.symbolType);
+            state_.symbolsOfZones[i].emplace_front(symbolInfo.position, symbolInfo.symbolType);
         for (const auto& doorInfo : zoneInfo.doors)
-            doorsOfZones_[i].emplace_back(doorInfo.position, doorInfo.isOpenedByDefault, doorInfo.textSpriteNumber);
+            state_.doorsOfZones[i].emplace_back(doorInfo.position, doorInfo.isOpenedByDefault,
+                                                doorInfo.textSpriteNumber);
         for (const auto& shutterInfo : zoneInfo.shutters)
-            shuttersOfZones_[i].emplace_back(shutterInfo.position, shutterInfo.isOpenedByDefault,
-                                             shutterInfo.textSpriteNumber);
+            state_.shuttersOfZones[i].emplace_back(shutterInfo.position, shutterInfo.isOpenedByDefault,
+                                                   shutterInfo.textSpriteNumber);
         for (const auto& hoverButtonInfo : zoneInfo.hoverButtons)
-            hoverButtonsOfZones_[i].emplace_back(hoverButtonInfo.position, hoverButtonInfo.textSpriteNumber,
-                                                 hoverButtonInfo.isOnByDefault);
+            state_.hoverButtonsOfZones[i].emplace_back(hoverButtonInfo.position, hoverButtonInfo.textSpriteNumber,
+                                                       hoverButtonInfo.isOnByDefault);
         for (const auto& pressureButtonInfo : zoneInfo.pressureButtons)
-            pressureButtonsOfZones_[i].emplace_back(pressureButtonInfo.position, pressureButtonInfo.textSpriteNumber,
-                                                    pressureButtonInfo.isOnByDefault);
+            state_.pressureButtonsOfZones[i].emplace_back(
+                pressureButtonInfo.position, pressureButtonInfo.textSpriteNumber, pressureButtonInfo.isOnByDefault);
     }
 
     // Allocate all graphics within current zone
-    player_.AllocateGraphicResource(PLAYER_Z_ORDER);
-    player_.SetCamera(camera_);
-    for (auto& symbol : symbolsOfZones_[currentZoneIdx_])
+    state_.player.AllocateGraphicResource(PLAYER_Z_ORDER);
+    state_.player.SetCamera(state_.camera);
+    for (auto& symbol : state_.symbolsOfZones[state_.currentZoneIdx])
     {
         symbol.AllocateGraphicResource(SYMBOL_Z_ORDER);
-        symbol.SetCamera(camera_);
+        symbol.SetCamera(state_.camera);
     }
-    for (auto& door : doorsOfZones_[currentZoneIdx_])
+    for (auto& door : state_.doorsOfZones[state_.currentZoneIdx])
     {
         door.AllocateGraphicResource(DOOR_Z_ORDER);
-        door.SetCamera(camera_);
+        door.SetCamera(state_.camera);
     }
-    for (auto& shutter : shuttersOfZones_[currentZoneIdx_])
+    for (auto& shutter : state_.shuttersOfZones[state_.currentZoneIdx])
     {
         shutter.AllocateGraphicResource(DOOR_Z_ORDER);
-        shutter.SetCamera(camera_);
+        shutter.SetCamera(state_.camera);
     }
-    for (auto& hoverButton : hoverButtonsOfZones_[currentZoneIdx_])
+    for (auto& hoverButton : state_.hoverButtonsOfZones[state_.currentZoneIdx])
     {
         hoverButton.AllocateGraphicResource(BUTTON_Z_ORDER);
-        hoverButton.SetCamera(camera_);
+        hoverButton.SetCamera(state_.camera);
     }
-    for (auto& pressureButton : pressureButtonsOfZones_[currentZoneIdx_])
+    for (auto& pressureButton : state_.pressureButtonsOfZones[state_.currentZoneIdx])
     {
         pressureButton.AllocateGraphicResource(BUTTON_Z_ORDER);
-        pressureButton.SetCamera(camera_);
+        pressureButton.SetCamera(state_.camera);
     }
 
     // Initialize Idle action
-    player_.InitIdleAction();
+    state_.player.InitIdleAction();
 }
 
 Game::~Game()
@@ -132,47 +147,35 @@ Game::~Game()
 bn::optional<Type> Game::Update()
 {
     // TODO
-
-    // Move player
-    if (bn::keypad::up_held())
-    {
-        player_.SetY(player_.GetY() - 3);
-    }
-    else if (bn::keypad::down_held())
-    {
-        player_.SetY(player_.GetY() + 3);
-    }
-    if (bn::keypad::left_held())
-    {
-        player_.SetX(player_.GetX() - 3);
-    }
-    else if (bn::keypad::right_held())
-    {
-        player_.SetX(player_.GetX() + 3);
-    }
+    playerMovement_.Update();
+    buttonInteraction_.Update();
 
     // Update sprite graphics
-    player_.Update();
-    for (auto& symbol : symbolsOfZones_[currentZoneIdx_])
+    state_.player.Update();
+    for (auto& symbol : state_.symbolsOfZones[state_.currentZoneIdx])
         symbol.Update();
-    for (auto& door : doorsOfZones_[currentZoneIdx_])
+    for (auto& door : state_.doorsOfZones[state_.currentZoneIdx])
         door.Update();
-    // for (auto& shutter : shuttersOfZones_[currentZoneIdx_])
-    //     shutter.Update();
+    for (auto& shutter : state_.shuttersOfZones[state_.currentZoneIdx])
+        shutter.Update();
+    for (auto& hoverButton : state_.hoverButtonsOfZones[state_.currentZoneIdx])
+        hoverButton.Update();
+    for (auto& pressureButton : state_.pressureButtonsOfZones[state_.currentZoneIdx])
+        pressureButton.Update();
 
     // Move camera (follows player)
-    camera_.set_position(player_.GetPosition());
-    helper::tilemap::SnapCameraToZoneBoundary(camera_, zoneBoundary_);
+    state_.camera.set_position(state_.player.GetPosition());
+    helper::tilemap::SnapCameraToZoneBoundary(state_.camera, state_.zoneBoundary);
 
     return bn::nullopt;
 }
 
 void Game::SetCurrentZone_(int zoneIdx)
 {
-    BN_ASSERT(0 <= zoneIdx && zoneIdx < stageInfo_.zoneInfos.size(), "Zone index out of range!");
+    BN_ASSERT(0 <= zoneIdx && zoneIdx < state_.stageInfo.zoneInfos.size(), "Zone index out of range!");
 
-    currentMapBg_ = stageInfo_.zoneInfos[zoneIdx].mapBg.create_bg({0, 0});
-    currentMapBg_.set_wrapping_enabled(false);
+    state_.currentMapBg = state_.stageInfo.zoneInfos[zoneIdx].mapBg.create_bg({0, 0});
+    state_.currentMapBg.set_wrapping_enabled(false);
 }
 
 } // namespace sym::scene
diff --git a/src/scene_Splash.cpp b/src/scene_Splash.cpp
index b266dbf..9b6fef6 100644
--- a/src/scene_Splash.cpp
+++ b/src/scene_Splash.cpp
@@ -12,8 +12,9 @@
 namespace sym::scene
 {
 
-Splash::Splash()
-    : bgs_{bn::regular_bg_items::bg_splash1.create_bg(0, 0), bn::regular_bg_items::bg_splash2.create_bg(0, 0)},
+Splash::Splash(scene::Param& sceneParam)
+    : IScene(sceneParam), bgs_{bn::regular_bg_items::bg_splash1.create_bg(0, 0),
+                               bn::regular_bg_items::bg_splash2.create_bg(0, 0)},
       fadeIn_(effect::Transition::Types::TRANSPARENCY, effect::Transition::Direction::IN, FADE_IN_UPDATE_COUNT),
       fadeOut_(effect::Transition::Types::TRANSPARENCY, effect::Transition::Direction::OUT, FADE_OUT_UPDATE_COUNT)
 {
diff --git a/src/scene_Title.cpp b/src/scene_Title.cpp
index a681fb0..5d317fc 100644
--- a/src/scene_Title.cpp
+++ b/src/scene_Title.cpp
@@ -16,9 +16,9 @@
 namespace sym::scene
 {
 
-Title::Title()
-    : cursor_{bn::sprite_items::spr_cursor_star.create_sprite(0, 0),
-              bn::sprite_items::spr_cursor_star.create_sprite(0, 0)},
+Title::Title(scene::Param& sceneParam)
+    : IScene(sceneParam), cursor_{bn::sprite_items::spr_cursor_star.create_sprite(0, 0),
+                                  bn::sprite_items::spr_cursor_star.create_sprite(0, 0)},
       bg_(bn::regular_bg_items::bg_title.create_bg(0, 0)),
       fadeIn_(effect::Transition::Types::FADE | effect::Transition::Types::SPRITE_MOSAIC |
                   effect::Transition::Types::BG_MOSAIC,