gistfile1.js

var app = playground({

  create: function() {

    app.loadData(...);

  },

  ready: function() {

    app.setState(PLAYGROUND.LoadingScreen);

    app.loadImages(...);

    app.loader.once("ready", app.stepTwo);

  },

  stepTwo: function() {

    /* MORE */

    app.loadImages(...);

    app.loader.once("ready", app.stepThree);

  },

  stepThree: function() {

    app.loadImages(...);

    app.loader.once("ready", app.stepFour);

  },

  stepFour: function() {

    app.setState(Game);

  }

});