body {
  margin: 0;
}
canvas {
  display: block;
}
#score,
#gameOver {
  position: absolute;
  color: white;
  font-family: Arial, sans-serif;
  font-size: 20px;
}
#score {
  top: 10px;
  left: 10px;
}
#gameOver {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 40px;
  display: none;
}