text: game.Interactive = function() {
  	document.addEventListener('mousemove', game.handleMouseMove, false);
  	document.addEventListener('mousedown', game.handleMouseDown, false);
  
  	// Listen to the screen: if the user resizes it
  	// we have to update the camera and the renderer size
  	window.addEventListener('resize', game.handleWindowResize, false);
  
  };
  
  game.handleMouseMove = function(event) {
  	var tx = -1 + (event.clientX / game.WIDTH)*2;
  	var ty = 1 - (event.clientY / game.HEIGHT)*2;
  	game.mousePos = {
  		x:tx, 
  		y:ty
  	};
  };
  
  game.handleMouseDown = function(event){
  	//console.log('mouse down');
  };
  
  game.handleWindowResize = function() {
  	renderer.setSize(window.innerWidth, window.innerHeight);
  	camera.aspect = window.innerWidth / window.innerHeight;
  	camera.updateProjectionMatrix();
  };