FB.js

var game = new Phaser.Game(400, 490, Phaser.AUTO, 'game_div');
var game_state = {};

game_state.main = function() { };  
game_state.main.prototype = {

    preload: function() { 
        this.game.stage.backgroundColor = '#71c5cf';

        this.game.load.image('bird', 'assets/bird.png');   
        this.game.load.image('pipe', 'assets/pipe.png');
    },

    create: function() { 
        this.bird = this.game.add.sprite(100, this.game.world.height/2, 'bird');
        this.bird.body.gravity.y = 1000; 

    	var space_key = this.game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR);
    	space_key.onDown.add(this.flap, this);
        
        this.pipes = game.add.group();
	this.pipes.createMultiple(20, 'pipe');
        this.timer = this.game.time.events.loop(1500, this.add_row_pipes, this);
	
        this.score = 0;
        var style = { font: "30px Arial", fill: "#ffffff"};
        this.label_score = this.game.add.text(20, 20, "0", style);      
    },

    update: function() {
	if (this.bird.inWorld == false)
	    this.restart_game();
        
        this.game.physics.overlap(this.bird, this.pipes, this.restart_game, null, this);
    },
    
    flap: function() {
	this.bird.body.velocity.y = -350;
    },
    
    add_one_pipe: function(x, y) {
    	var pipe = this.pipes.getFirstDead();
        pipe.outOfBoundsKill = true;
    	pipe.reset(x, y);
    	pipe.body.velocity.x = -200; 
    },
    
    add_row_pipes: function() {
	var hole = Math.floor(Math.random()*5)+1;
	    for (var i = 0; i < 8; i++) 
		if (i != hole && i != hole +1) 
		    this.add_one_pipe(this.game.world.width, i*60+10);  

        this.score += 1;
        this.label_score.content = this.score;     
    },

    restart_game: function(bird, pipe) {
        this.game.time.events.remove(this.timer);
	this.game.state.start('main');
    }
}

game.state.add('main', game_state.main);  
game.state.start('main');