body {
  background-color: skyblue;
  text-align: center;
}

#header {
  margin-bottom: 20px;
}

#game {
  width: 500px;
  height: 500px;
  margin: 0 auto;
  position: relative;
}

#fruit {
  width: 50px;
  height: 50px;
  background-image: url("https://i.imgur.com/B6NYZWB.png");
  background-size: cover;
  position: absolute;
  bottom: 0;
  left: 0;
}