body {
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #87CEEB; /* Light Blue background */
}

#game-container {
  position: relative;
  width: 600px;
  height: 300px;
  background-color: #fff;
  border: 2px solid #000;
  overflow: hidden;
}

#sonic {
  position: absolute;
  width: 50px;
  height: 50px;
  background-color: #f00; /* Red for Sonic */
  border-radius: 50%;
  bottom: 0;
  left: 50px;
}

#enemy {
  position: absolute;
  width: 50px;
  height: 50px;
  background-color: #00f; /* Blue for enemy */
  border-radius: 50%;
  bottom: 0;
  left: 400px;
}