TestGame.MainMenu = function (game) { // Our main menu this.game = game; }; TestGame.MainMenu.prototype = { create: function () { var bg = this.game.add.sprite(0, 100, 'nocooper'); bg.scale.setTo(2.5, 2.5); var t = this.game.add.sprite(100, 600, 'touhou'); t.anchor.setTo(0, 1); button = this.game.add.button(this.game.world.centerX, 400, 'button', this.startGame, this, 2, 1, 0); button.anchor.setTo(0.5, 0.5); }, startGame: function () { console.log('lets play'); this.game.state.start('game'); } }