diff --git a/.gitignore b/.gitignore
index 3c69019..83f601e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -153,3 +153,10 @@ dmypy.json
 
 # Cython debug symbols
 cython_debug/
+
+# UPX archive
+upx-*.zip
+packaging/upx-*
+
+# Versionfile
+**/versionfile.txt
diff --git a/images/icon-48.png b/images/icon-48.png
new file mode 100644
index 0000000..279e36d
Binary files /dev/null and b/images/icon-48.png differ
diff --git a/scripts/build.py b/scripts/build.py
index 2011791..c896e26 100644
--- a/scripts/build.py
+++ b/scripts/build.py
@@ -61,7 +61,7 @@ def build_pyinstaller_args(
 ) -> list[str]:
     logger.info("Build Pyinstaller args.")
     build_args = []
-    script_entrypoint = f"{PACKAGE_NAME}/__main__.py"
+    script_entrypoint = f"src/{PACKAGE_NAME}/__main__.py"
 
     logger.info(f"entrypoint: {script_entrypoint}")
     build_args += [script_entrypoint]
@@ -75,11 +75,16 @@ def build_pyinstaller_args(
     logger.info(f"Output exe filename: {output_filename}")
     build_args += ["-n", output_filename]
 
-    logger.info(f"Output file icon: {ASSETS_PATH.joinpath('icon-48.png')}")
-    build_args += ["--icon", f"{ASSETS_PATH.joinpath('icon-48.png')}"]
+    logger.info(f"Output file icon: {ASSETS_PATH.joinpath('icon-256.ico')}")
+    build_args += ["--icon", f"{ASSETS_PATH.joinpath('icon-256.ico')}"]
 
     logger.info(f"Add assets folder: {ASSETS_PATH}")
-    build_args += ["--add-data", f"{ASSETS_PATH};./{ASSETS_FOLDER}"]
+    build_args += ["--add-data", f"{ASSETS_PATH}/*;./{ASSETS_FOLDER}"]
+    for items in ASSETS_PATH.glob("**/*"):
+        if not items.is_dir():
+            continue
+        logger.info(f"Add data: {items};./{ASSETS_FOLDER}/{items.name}")
+        build_args += ["--add-data", f"{items};./{ASSETS_FOLDER}/{items.name}"]
 
     logger.info(f"Add splash image: {ASSETS_PATH.joinpath('splash.png')}")
     build_args += ["--splash", f"{ASSETS_PATH.joinpath('splash.png')}"]
diff --git a/src/doggo/__init__.py b/src/doggo/__init__.py
index 2119d2f..4ba13ff 100644
--- a/src/doggo/__init__.py
+++ b/src/doggo/__init__.py
@@ -1,11 +1,14 @@
 from __future__ import annotations
 
-from importlib import metadata
+import sys
+
 from pathlib import Path
 
+from doggo.config import COMPILED_ENV
 
-__app_name__ = "doggo"
-__version__ = metadata.version(__app_name__)
 
-ROOT_PATH = Path(__file__).parent
+if COMPILED_ENV:
+    ROOT_PATH = Path(sys._MEIPASS)  # type: ignore
+elif __file__:
+    ROOT_PATH = Path(__file__).parent
 ASSETS_PATH = ROOT_PATH.joinpath("assets")
diff --git a/src/doggo/__main__.py b/src/doggo/__main__.py
index a45609d..bfa7691 100644
--- a/src/doggo/__main__.py
+++ b/src/doggo/__main__.py
@@ -2,6 +2,7 @@
 
 import pygame as pg
 
+from doggo import ASSETS_PATH
 from doggo import config
 from doggo.config import COMPILED_ENV
 from doggo.world import World
@@ -21,6 +22,7 @@ def run() -> None:
     world = World(
         title=config.WORLD_TITLE,
         size=(config.WORLD_WIDTH, config.WORLD_HEIGHT),
+        icon=ASSETS_PATH.joinpath("icon-256.png"),
         fps=config.WORLD_FPS,
     )
 
diff --git a/src/doggo/assets/icon-256.ico b/src/doggo/assets/icon-256.ico
new file mode 100644
index 0000000..c751096
Binary files /dev/null and b/src/doggo/assets/icon-256.ico differ
diff --git a/src/doggo/assets/icon-256.png b/src/doggo/assets/icon-256.png
new file mode 100644
index 0000000..fc3afbc
Binary files /dev/null and b/src/doggo/assets/icon-256.png differ
diff --git a/src/doggo/assets/splash.png b/src/doggo/assets/splash.png
new file mode 100644
index 0000000..17aa3b2
Binary files /dev/null and b/src/doggo/assets/splash.png differ
diff --git a/src/doggo/world.py b/src/doggo/world.py
index 392eeaa..1432285 100644
--- a/src/doggo/world.py
+++ b/src/doggo/world.py
@@ -1,7 +1,10 @@
 from __future__ import annotations
 
+import sys
 import time
 
+from typing import TYPE_CHECKING
+
 import pygame as pg
 
 from loguru import logger
@@ -12,13 +15,19 @@
 from doggo.ui import DraggableWindow
 
 
+if TYPE_CHECKING:
+    from pathlib import Path
+
+
 class World:
     """The world where the dog lives.
 
     It contains the game loop and the main logic of the game.
     """
 
-    def __init__(self, title: str, size: tuple[int, int], fps: int = 60) -> None:
+    def __init__(
+        self, title: str, size: tuple[int, int], icon: Path, fps: int = 60
+    ) -> None:
         self.window: pg.window.Window = pg.window.Window(
             title=title,
             size=size,
@@ -26,6 +35,7 @@ def __init__(self, title: str, size: tuple[int, int], fps: int = 60) -> None:
             always_on_top=True,
         )
         self.screen: pg.Surface = self.window.get_surface()
+        self.window.set_icon(pg.image.load(icon).convert_alpha())
         self.draggable: DraggableWindow = DraggableWindow(window=self.window)
         self.fps: int = fps
         self.clock: pg.time.Clock = pg.time.Clock()
@@ -88,4 +98,4 @@ def stop() -> None:
         """Stop the world."""
         pg.quit()
         logger.info("World stopped. Dog is going to sleep.")
-        exit()
+        sys.exit()