diff --git a/README.md b/README.md
index f5c4b56..304c132 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,11 @@ collection.
 4. **Disc Colors**:
     - 10 different stone colors to choose from
 
+5. **Input controls**
+    - Keyboard
+    - Joystick
+    - Mouse
+
 ## Othello Rules
 
 Othello, also known as Reversi, is a two-player strategy board game played on an
diff --git a/img/cx16-othello.gif b/img/cx16-othello.gif
index e9f6ad3..8d6ff57 100644
Binary files a/img/cx16-othello.gif and b/img/cx16-othello.gif differ
diff --git a/src/constants.h b/src/constants.h
index 6c0d0fe..3873769 100644
--- a/src/constants.h
+++ b/src/constants.h
@@ -107,4 +107,6 @@
 
 #define RAMBANK (*(uint8_t*)0)
 
+#define SCROLL_BACKGROUND   1
+
 #endif // _CONSTANTS_H
\ No newline at end of file
diff --git a/src/video.c b/src/video.c
index d8c5f36..22f57dc 100644
--- a/src/video.c
+++ b/src/video.c
@@ -313,6 +313,7 @@ void clear_foreground() {
  * 
  */
 void update_background_diagonal() {
+    #if SCROLL_BACKGROUND == 1
     clock_t curtick = clock();
 
     if(((curtick - prevtick) * 1000 / CLOCKS_PER_SEC) > 30) {
@@ -320,6 +321,7 @@ void update_background_diagonal() {
         VERA.layer0.hscroll = (VERA.layer0.hscroll - 1) % 16;
         VERA.layer0.vscroll = (VERA.layer0.vscroll - 1) % 16;
     }
+    #endif
 }
 
 /**