#gameScreen{margin:0 auto;position:relative;background-color:silver;overflow:hidden;border:solid #000 2px}.wall{position:absolute;background-color:#000}.gameObject{position:absolute;z-index:2}#walls{position:absolute}#introScreen{position:absolute;z-index:100;height:600px;width:800px;background-color:silver}#introScreenContent{width:300px;height:100px;padding:20px;margin:80px auto;text-align:center;color:#000}.button{padding:10px;border-radius:10px;width:100px;text-align:center;cursor:hand;cursor:pointer;font-size:14pt;background-color:#000;color:#ff0;margin:0 auto;border:#ff0 solid 1px}.button:hover{background-color:#ff0;color:#000;border:#000}.noSelect{user-select:none;-o-user-select:none;-moz-user-select:none;-khtml-user-select:none;-webkit-user-select:none}#endScreen{position:absolute;z-index:101;height:600px;width:800px;background-color:silver;display:none}#endScreenContent{position:absolute;width:800px;height:600px;padding:20px;margin:80px auto;text-align:center;color:#000}#creditsScreen{text-align:center;position:absolute;z-index:103;height:600px;width:800px;background-color:silver;display:none}#counter{position:absolute;font-size:200%;color:#ff0;left:5px;z-index:1;height:10px;width:10px}