body {
  margin: 0;
  overflow: hidden;
  background: #444;
  font-family: sans-serif;
}

.gameArea {
  width: 400px;
  height: 600px;
  margin: auto;
  position: relative;
  background: #222;
  border: 2px solid #fff;
}

.car {
  width: 50px;
  height: 100px;
  background: red;
  position: absolute;
  bottom: 10px;
  left: 175px;
  border-radius: 5px;
}

.enemy {
  width: 50px;
  height: 100px;
  background: yellow;
  position: absolute;
  border-radius: 5px;
}

.score {
  position: absolute;
  color: white;
  top: 10px;
  left: 10px;
  z-index: 10;
}