demos/lesson08.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>Gamedev Phaser Workshop - lesson 08: Game over</title>
    <style>* { padding: 0; margin: 0; }</style>
    <script src="js/phaser.2.4.2.min.js"></script>
</head>
<body>
<script>
var game = new Phaser.Game(480, 320, Phaser.AUTO, null, {preload: preload, create: create, update: update});

var ball;
var paddle;

function preload() {
    game.scale.scaleMode = Phaser.ScaleManager.SHOW_ALL;
    game.scale.pageAlignHorizontally = true;
    game.scale.pageAlignVertically = true;
    game.stage.backgroundColor = '#eee';
    game.load.image('ball', 'img/ball.png');
    game.load.image('paddle', 'img/paddle.png');
}
function create() {
    game.physics.startSystem(Phaser.Physics.ARCADE);
    game.physics.arcade.checkCollision.down = false;
    ball = game.add.sprite(game.world.width*0.5, game.world.height-25, 'ball');
    ball.anchor.set(0.5);
    game.physics.enable(ball, Phaser.Physics.ARCADE);
    ball.body.velocity.set(150, -150);
    ball.body.collideWorldBounds = true;
    ball.body.bounce.set(1);
    ball.checkWorldBounds = true;
    ball.events.onOutOfBounds.add(function(){
        alert('Game over!');
        location.reload();
    }, this);

    paddle = game.add.sprite(game.world.width*0.5, game.world.height-5, 'paddle');
    paddle.anchor.set(0.5,1);
    game.physics.enable(paddle, Phaser.Physics.ARCADE);
    paddle.body.immovable = true;
}
function update() {
    game.physics.arcade.collide(ball, paddle);
    paddle.x = game.input.x || game.world.width*0.5;
}
</script>
</body>
</html>