body {
  margin: 0;
  overflow: hidden;

  background-image: url("hamsterbg.gif");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;

  height: 100vh;
}


html, 
a, button{
  cursor: url("cursor.png") 8 8, auto ;
}


.hamster {
  position: fixed;

  width: 80px;
  height: auto;
}

.back-button {
  position: fixed;

  top: 20px;
  left: 20px;

  z-index: 999;
}

.back-img {
  width: 120px;
  height: auto;

  display: block;
}