body{
    text-align: center;
    background-color: #011F3F;
}
#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 black solid;
    border-radius: 20%;
}

.game-over {
  background-color: red;
  opacity: 0.8;
}

.yellow{background-color: yellow;}
.red{background-color: red;}
.blue{background-color: blue;}
.green{background-color: green;}

.pressed {
  box-shadow: 0 0 20px white;
  background-color: grey;
}