#gameCanvas {
  position:absolute;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
  bottom: 0px;
  right:0px;
  border: 0px;
  background-color: black;
  -webkit-tap-highlight-color: rgba(0,0,0,0);
  image-rendering: -moz-crisp-edges;
  image-rendering: -webkit-crisp-edges;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  touch-action: none;
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  user-select: none;
} 

.tapFocusIndicator {
    color: white;
    position: absolute;
    border: 3px solid gray;
    left: 0px;
    right: 0px;
    top: 0px;
    bottom: 0px;
}