text: /*global WorldCreator*/
  
  (function () {'use strict';
  
      var button = document.createElement('button');
      button.textContent = 'Start game';
      document.body.appendChild(button);
  
      button.addEventListener('click', function () {
          var wc = new WorldCreator();
          wc.createWorld('game.json');
      });
  
  }());
  