===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,65 @@
-/****
+/**** 
+* Classes
+****/ 
+var Ball = Container.expand(function () {
+	var self = Container.call(this);
+	// Attach ball graphics
+	var ballGraphics = self.attachAsset('ball', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// Physics properties
+	self.velocityX = 8;
+	self.velocityY = 6;
+	self.gravity = 0.3;
+	self.bounce = 0.8;
+	// Update physics and bouncing
+	self.update = function () {
+		// Apply gravity
+		self.velocityY += self.gravity;
+		// Update position
+		self.x += self.velocityX;
+		self.y += self.velocityY;
+		// Bounce off left and right walls
+		if (self.x <= 40 || self.x >= 2008) {
+			self.velocityX = -self.velocityX * self.bounce;
+			self.x = self.x <= 40 ? 40 : 2008;
+		}
+		// Bounce off top and bottom walls
+		if (self.y <= 40 || self.y >= 2692) {
+			self.velocityY = -self.velocityY * self.bounce;
+			self.y = self.y <= 40 ? 40 : 2692;
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
+// Create and add the ball to the game
 var game = new LK.Game({
 	backgroundColor: 0x000000
-});
\ No newline at end of file
+});
+
+/**** 
+* Game Code
+****/ 
+// Create and add the ball to the game
+var ball = game.addChild(new Ball());
+// Position ball at center of screen
+ball.x = 2048 / 2;
+ball.y = 2732 / 2;
+// Touch interaction to add momentum
+game.down = function (x, y, obj) {
+	// Calculate direction from ball to touch point
+	var deltaX = x - ball.x;
+	var deltaY = y - ball.y;
+	var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
+	// Normalize and apply force
+	if (distance > 0) {
+		var force = 15;
+		ball.velocityX += deltaX / distance * force;
+		ball.velocityY += deltaY / distance * force;
+	}
+};
\ No newline at end of file