body {
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background-color: #f0f0f0;
}

#game-container {
  position: relative;
  width: 400px;
  height: 600px;
  border: 2px solid #000;
  overflow: hidden;
}

#player {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 50px;
  background-color: blue;
}

.falling-object {
  position: absolute;
  width: 30px;
  height: 30px;
  background-color: red;
  border-radius: 50%;
  animation: blink 0.5s infinite alternate;
}

@keyframes blink {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

#game-over {
  font-size: 24px;
  color: red;
  margin-top: 20px;
  display: none;
}