.gui{position:absolute;width:100%;height:100%;top:0;left:0;pointer-events:none}.gui .btn-start{width:50px;height:50px;display:flex;justify-content:center;align-items:center;border-radius:50%;background:#fff;border:0;pointer-events:all;font-weight:700;position:absolute;left:50%;margin-left:-25px;bottom:20px}.gui .score{position:absolute;top:20px;left:0;font-size:20px;color:#fff;width:100%;text-align:center;color:#000;font-weight:700;font-size:40px}body{overflow:hidden;font-family:Arial,Helvetica,sans-serif}.game{background-color:#eae5e2;position:absolute;width:100%;height:100%;top:0;left:0;z-index:19}.engine-canvas{width:100%;height:100%}