diff --git a/lesson#27 - in, out, inout type qualifiers/ourGame/source/game/player.d b/lesson#27 - in, out, inout type qualifiers/ourGame/source/game/player.d
index 53f62b6..c289bdf 100644
--- a/lesson#27 - in, out, inout type qualifiers/ourGame/source/game/player.d	
+++ b/lesson#27 - in, out, inout type qualifiers/ourGame/source/game/player.d	
@@ -3,7 +3,7 @@ module game.player;
 import game.data;
 
 class Player: Entity {
-	this(const ref Texture2D texture, const Rectangle frame, const Vector2 position) {
+	this(in Texture2D texture, in Rectangle frame, in Vector2 position) {
 		super(texture, frame, position);
 	}
 	
diff --git a/lesson#29 - Player movement animation/ourGame/source/game/play.d b/lesson#29 - Player movement animation/ourGame/source/game/play.d
index efa2cb9..6d46cf2 100644
--- a/lesson#29 - Player movement animation/ourGame/source/game/play.d	
+++ b/lesson#29 - Player movement animation/ourGame/source/game/play.d	
@@ -48,7 +48,7 @@ class Play: IState {
         BeginDrawing(); scope(exit) { EndDrawing(); }
     
         // clear background
-        ClearBackground(Colors.YELLOW);
+        ClearBackground(Colors.GRAY);
         
         // draw
         player.draw();