body, html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #05000f;
  cursor: pointer;
}
canvas {
  display: block;
}
#instructions {
  position: absolute;
  bottom: 20px;
  width: 100%;
  text-align: center;
  color: rgba(255, 255, 255, 0.4);
  font-family: sans-serif;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-size: 12px;
  pointer-events: none;
}