body {
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f0f0f0;
    touch-action: none;
}

#gameCanvas {
    border: 2px solid #333;
    background-color: #fff;
}

#score {
    position: absolute;
    top: 20px;
    font-size: 24px;
}