body {
  margin: 0;
  padding: 0;
  background-color: #494949;
}

#game {
  background-color: #494949;
  text-align: center;
}

#game canvas {
  position: absolute;
  left: 50%;
  top: 50%;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  -webkit-box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.3);
  -moz-box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.3);
  box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.3);
}