body {
  margin: 0;
  padding: 0;
  background: #ccc; }
  body h1 {
    text-align: center;
    margin-top: 5px;
    margin-bottom: 5px; }
  body #game-container {
    left: 0;
    right: 0;
    margin: 10px auto auto;
    text-align: center; }
    body #game-container > canvas:hover {
      cursor: none; }