body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #70C5CE;
}

#game-container {
  position: relative;
  width: 400px;
  height: 600px;
  margin: 50px auto;
  border: 2px solid black;
  overflow: hidden;
}

#bird {
  position: absolute;
  width: 50px;
  height: 50px;
  background-color: #70C5CE;
  border-radius: 50%;
  top: 50%;
  left: 50px;
}

#pipe {
  position: absolute;
  width: 60px;
  height: 300px;
  background-color: #87CEEB;
  bottom: 0;
}