body{color:#fff;background-color:#000;margin:0;overflow:hidden}canvas{display:block}.level-menu{gap:4px;display:flex;position:fixed;top:8px;left:8px}.level-menu button{color:#333;cursor:pointer;background-color:#ffffffb3;border:0;border-radius:4px;padding:6px 12px;font:14px system-ui,sans-serif}.level-menu button[aria-pressed=true]{color:#fff;background-color:#333}