[myfonj]

Pretty neat! And I see you have included that tileset natively. I think that making "pure ASCII image-less tileset" should be piece of cake as well:

  .tile:after {
    display: block;
    text-align: center;
    font: bold 30px/30px monospace;
  }
  .tile158:after {
    content: '@';
    color: yellow;
  }