#matter-js-canvas {
    position: fixed !important;
    top: 0;
    left: 0;
    z-index: -1;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #2c2922;
}

#matter-js-canvas rect {
    transform: scale(0.5);
    transform-origin: center center;
}