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

#player {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  background-color: red;
  border-radius: 50%;
}

#target {
  position: absolute;
  top: 0;
  left: 0;
  width: 20px;
  height: 20px;
  background-color: green;
  border-radius: 50%;
}

#timer {
  position: absolute;
  top: 0;
  right: 0;
  font-size: 24px;
  padding: 10px;
}

.time-up {
  color: red;
}