body {
    margin: 0;
    overflow: hidden;
    font-family: Arial, sans-serif;
    background-color: #000;
    color: #fff;
}

#gameCanvas {
    display: block;
    background-color: #333;
    margin: 0 auto;
}

#instructions {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.7);
    padding: 10px;
    border-radius: 5px;
}

#score {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 24px;
}