define(function(){
var _game = null,
_starfield = null;
return{
init: function(game,level,mode){
_game = game;
},
preload: function(){
_game.load.image('starfield', 'assets/img/starfield.png');
},
create: function(){
_starfield = _game.add.tileSprite(0, 0,800,600, 'starfield');
},
update: function(){
_starfield.tilePosition.y +=2;
}
}
});