body {
    background: #222;
    color: #fff;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
.wrapper {
    text-align: center;
}
#gameCanvas {
    background: #000;
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
}
#score {
    margin-top: 10px;
    font-size: 24px;
}