JSFiddle - React, Tailwind, and code Playground

HTML

<div class="game" id="game"></div>

JavaScript

var Level = function() { 
  console.log(this.objectsPointers.f);
};

Level.prototype = {   

  finalization: function() { 

  },

  hfghfgf: function() { 

  }
};


var Game = function(options) {
  this.objectsPointers = {
    f: 1,
    levelObj: 'undefined',
    playerObserverObj: 'undefined',
    targetObserverObj: 'undefined',
    enemyObserverObj: 'undefined',
    fieldObj: 'undefined',
    playerObj: 'undefined',
    targetObj: 'undefined',
    enemyObj: {}
  },

  this.options = {
    level: options.level || 1,
    fieldWidth: options.fieldWidth || 20,
    fieldHeight: options.fieldHeight || 20
  };
      
  while (this.options.level < 10) {
    break;
    this.objectsPointers.levelObj = new Level;
  }

  console.log('you win!');
};


				var	app = new Game();