#gameCanvas {
  position:absolute;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
  bottom: 0px;
  right:0px;
  border: 0px;
  background-color: black;
} 

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