body {
	background-color: #222;
	overflow: hidden;
	padding: 0;
	margin: 0;
}

canvas {
	position: fixed;
	top: 50%;
	left: 50%;
	margin-top: -1000px;
	margin-left: -1000px;
}

.menu {
	position: fixed;
	top: 20px;
	left: 20px;
	z-index: 100;
}