body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
  }
  
  .game-container {
    text-align: center;
  }
  
  .circle {
    width: 100px;
    height: 100px;
    background-color: red;
    border-radius: 50%;
    position: relative;
    cursor: pointer;
    animation: moveCircle 2s infinite;
  }
  
  @keyframes moveCircle {
    0% { left: 0; }
    50% { left: calc(100% - 100px); }
    100% { left: 0; }
  }
  
  button{
    position: fixed;
    top: 30px;
    left: 30px;
    color: rgb(0, 0, 0);
    border: none; 
    background-color: transparent;
  }