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 black;border-radius:20%}.game-over{background-color:red;opacity:0.8}.red{background-color:red}.green{background-color:green}.blue{background-color:blue}.yellow{background-color:yellow}.pressed{box-shadow:0 0 20px white;background-color:grey}