style.css

 * {
 	margin: 0px;
 	padding: 0px;
 	box-sizing: border-box;
}

#spielbehalter {
	position: absolute;
}

#hauptteil {
	width: 800px;
	height: 600px;
	background: url("img/hintergrund.jpg");
}

.spiel {
	width: 100%;
	height: 100%;
	position: absolute;
	display: none;
}

#startbild {
	padding: 150px 80px;
}

.klickmich {
	margin: 10px;
	padding: 10px;
}

#losSpiel {
	width: 120px;
	height: 42px;
	background: url("img/buttons.png") 0px -10px;
	cursor: pointer;
}

#hilfe1 {
	width: 120px;
	height: 54px;
	background: url("img/buttons.png") 0px 55px;
	cursor: pointer;
}

.btns .btn {
	width: 50px;
	height: 60px;
	display: inline-block;
}

.btns {
	margin: 20px;	
	cursor: pointer;
}

.btns span{
	color: white;
	font: 30px "Comic Sans MS";
	margin-bottom: -20px; 
	margin-left: 10px;
}

.nachricht {
	width: 500px;
	height: 300px;
	margin: 150px auto;
	background: rgba(140, 140, 140, 0.4);
	padding: 10px;
}

#weiter {	
	background: url("img/buttons.png") 50px 0px;
}

#neustart {	
	background: url("img/buttons.png") 50px 60px;
}

#hauptmenu {	
	background: url("img/buttons.png") -200px 0px;
}

.btns1 .btn {
	width: 25px;
	height: 25px;
	display: inline-block;
}

.btns1 {
	margin: 10px;	
}

.btns1 span{
	color: white;
	font: 20px "Comic Sans MS";
	margin-bottom: -5px; 
	margin-left: 10px;
}

#upkey {
	background: url("img/keys.png") 0px 0px;
}

#downkey {
	background: url("img/keys.png") 0px 25px;
}

#pkey {
	background: url("img/keys.png") 25px 0px;
}

#hkey {
	background: url("img/keys.png") 25px 25px;
}

#wkey {
	background: url("img/keys.png") 50px 0px;
}

#skey {
	background: url("img/keys.png") 50px 25px;
}

#zuruck {
	width: 90px;
	height: 35px;
	background: url("img/back.png");
	cursor: pointer;
	margin-left: 20px;
}

#kontrol {
	padding: 0% 30%;
}

.btn2 {
	display: inline-block;
	cursor: pointer;
	width: 50px;
	height: 60px;
	margin-left: 30px;
}
#musik {
	background: url("img/buttons.png") 160px 65px;	
}

#hilfebtn {	
	background: url("img/buttons.png") 160px 0px;	
}

#title {
	color: rgba(40,40,40,1);
	font: 26px "Comic Sans MS";
}

#neustart1 {	
	background: url("img/buttons.png") 50px 60px;
}

#hauptmenu1 {	
	background: url("img/buttons.png") -200px 0px;
}