html {
  background: url(stars2.png) center center fixed;
  background-repeat: repeat;
  background-color: #000;
}

canvas {
  background: #000;
  cursor:url("cursor.png"), auto;
  padding-left: 0;
  padding-right: 0;
  margin-left: auto;
  margin-right: auto;
  margin-top: auto;
  margin-bottom: auto;
  display: block;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}