#game {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  -o-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  background-color: white; }

body {
  margin: 0;
  padding: 0;
  background-color: black; }