===================================================================
--- original.js
+++ change.js
@@ -1,9 +1,9 @@
 /**** 
 * Classes
 ****/
-// Paddle class
-var Paddle = Container.expand(function () {
+// RightPaddle class
+var RightPaddle = Container.expand(function () {
 	var self = Container.call(this);
 	var paddleGraphics = self.attachAsset('paddle', {
 		anchorX: 0.5,
 		anchorY: 0.5
@@ -15,8 +15,23 @@
 	self.moveDown = function () {
 		self.y += self.speed;
 	};
 });
+// LeftPaddle class
+var LeftPaddle = Container.expand(function () {
+	var self = Container.call(this);
+	var paddleGraphics = self.attachAsset('paddle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 10;
+	self.moveUp = function () {
+		self.y -= self.speed;
+	};
+	self.moveDown = function () {
+		self.y += self.speed;
+	};
+});
 // Ball class
 var Ball = Container.expand(function () {
 	var self = Container.call(this);
 	var ballGraphics = self.attachAsset('ball', {
@@ -71,11 +86,11 @@
 // Instantiate and add background to the game
 var background = game.addChild(new Background());
 // Define the ball asset
 // Define the paddle asset
-// Initialize paddles and ball
-var leftPaddle = game.addChild(new Paddle());
-var rightPaddle = game.addChild(new Paddle());
+// Initialize paddles
+var leftPaddle = game.addChild(new LeftPaddle());
+var rightPaddle = game.addChild(new RightPaddle());
 var ball = game.addChild(new Ball());
 // Set initial positions
 leftPaddle.x = 50;
 leftPaddle.y = 2732 / 2;