.game-over,.red{background-color:red}body{text-align:center;background-color:#011f3f}#level-title{font-family:'Press Start 2P',cursive;font-size:3rem;margin:5%;color:#fef2bf}.container{display:block;width:50%;margin:auto}.btn{margin:25px;display:inline-block;height:200px;width:200px;border:10px solid #000;border-radius:20%}.game-over{opacity:.8}.green{background-color:green}.blue{background-color:#00f}.yellow{background-color:#ff0}.pressed{box-shadow:0 0 20px #fff;background-color:grey}