var Ball = Container.expand(function () {
	var self = Container.call(this);
	var ballGraphics = self.createAsset('ball', 'Soccer Ball', .5, .5);
	self.speed = {
		x: 5,
		y: 5
	};
	self.move = function () {
		self.x += self.speed.x;
		self.y += self.speed.y;
	};
	self.bounce = function (axis) {
		self.speed[axis] *= -1;
	};
});
var Paddle = Container.expand(function () {
	var self = Container.call(this);
	var paddleGraphics = self.createAsset('paddle', 'Player Paddle', .5, .5);
	self.speed = 5;
	self.move = function (direction) {
		self.y += direction * self.speed;
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var background = self.createAsset('background', 'Game Background', 0, 0);
	background.width = 2048;
	background.height = 2732;
	var ball = self.addChild(new Ball());
	ball.x = 2048 / 2;
	ball.y = 2732 / 2;
	var playerPaddle = self.addChild(new Paddle());
	playerPaddle.x = 100;
	playerPaddle.y = 2732 / 2;
	var aiPaddle = self.addChild(new Paddle());
	aiPaddle.x = 2048 - 100;
	aiPaddle.y = 2732 / 2;
	var scoreTxt = new Text2('0 - 0', {
		size: 150,
		fill: "#ffffff"
	});
	scoreTxt.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(scoreTxt);
	var playerScore = 0;
	var aiScore = 0;
	function updateScore() {
		scoreTxt.setText(playerScore + ' - ' + aiScore);
	}
	LK.on('tick', function () {
		ball.move();
		if (ball.x <= 0) {
			if (aiScore < 5) {
				aiScore++;
				updateScore();
				if (aiScore == 5) {
					LK.showGameOver();
				}
			} else {
				LK.showGameOver();
			}
			ball.x = 2048 / 2;
			ball.y = 2732 / 2;
		}
		if (ball.x >= 2048) {
			if (playerScore < 5) {
				playerScore++;
				updateScore();
				if (playerScore == 5) {
					LK.showGameOver();
				}
			} else {
				LK.showGameOver();
			}
			ball.x = 2048 / 2;
			ball.y = 2732 / 2;
		}
		if (ball.y <= 0 || ball.y >= 2732) {
			ball.bounce('y');
		}
		if (ball.intersects(playerPaddle) || ball.intersects(aiPaddle)) {
			ball.bounce('x');
		}
		if (ball.y > aiPaddle.y) {
			aiPaddle.move(1);
		} else {
			aiPaddle.move(-1);
		}
	});
	stage.on('move', function (obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		playerPaddle.y = pos.y;
	});
});

===================================================================
--- original.js
+++ change.js
@@ -1,10 +1,10 @@
 var Ball = Container.expand(function () {
 	var self = Container.call(this);
 	var ballGraphics = self.createAsset('ball', 'Soccer Ball', .5, .5);
 	self.speed = {
-		x: 10,
-		y: 10
+		x: 5,
+		y: 5
 	};
 	self.move = function () {
 		self.x += self.speed.x;
 		self.y += self.speed.y;