body {
    background-color: black;
}

#canvas {
    width: 640px;
    height: 480px;
    position: absolute;
    top:50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgb(69,69,69);
}

#play {
    position: absolute;
    top:55%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: none;
    pointer-events: none;
}