body {
    font-family: Arial, Helvetica, "Liberation Sans", FreeSans, sans-serif;
    margin: 0;
    padding: 0;
    border-width: 0;
    cursor: pointer;
  }

  #menu {
    position: relative;
    list-style-type: none;
    padding-left: 5px;
    z-index: 1000;
    /* 1 */
    display: inline-block;
    text-align: center;
  }

  #menu li {
    margin: 2px;
    padding: 4px 10px;
    border-radius: 5px;
  }

 
  #forPuzzle {
    position: absolute;
    width: 95vw;
    height: 95vh;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    overflow: hidden;
  }

  .polypiece {
    display: block;
    overflow: hidden;
    position: absolute;
  }

  .moving {
    transition-property: top, left;
    transition-duration: 1s;
    transition-timing-function: linear;
  }

  .gameCanvas {
    display: none;
    overflow: hidden;
    position: absolute;
  }