quote https://github.com/lukewilde/phaser-js-boilerplate/blob/master/src/js/game/app.js

gistfile1.js

  //...
  , game = new Phaser.Game(properties.size.x, properties.size.y, Phaser.AUTO, 'game');

// Automatically register each state.
_.each(states, function(state, key) {
  game.state.add(key, state(game));
});
//...