#home-button {
  position: fixed; /* stays in the same place on screen */
  top: 20px;
  left: 20px;
  padding: 10px 20px;
  font-size: 20px;
  background-color: black;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  z-index: 1000; /* on top of the canvas */
}