feat: Implement pixel-art rendering with new level loading, tile maps, palettes, and pixel fonts, alongside a game over screen.

src/components/Sprite.js

@@ -9,10 +9,13 @@ export class Sprite extends Component {
     this.shape = shape; // 'circle', 'rect', 'slime'
     this.alpha = 1.0;
     this.scale = 1.0;
-        
+
     // Animation properties
     this.animationTime = 0;
-    this.morphAmount = 0; // For slime morphing
+    this.animationState = 'idle'; // 'idle', 'walk'
+    this.animationSpeed = 4; // frames per second
+    this.morphAmount = 0; // Legacy slime morphing
   }
 }
 
+