body {
  text-align: center;
  background-color: #011F3F;
}

#level-title {
  font-family: 'Press Start 2P', cursive;
  font-size: 3rem;
  margin: 5%;
  color: #FEF2BF;
}

.container {
  display: none;
  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;
}

.start-button button {
  font-family: "VT323", monospace;
  font-size: 2.5rem;
  letter-spacing: 3px;
  color: white;
  background-color: #005800;
  padding: 1.5rem;
  border-bottom: 6px inset rgba(0, 0, 0, .5);
  border-left: 6px inset rgba(0, 0, 0, .5);
  border-right: 6px inset rgba(255, 255, 255, .5);
  border-top: 6px inset rgba(255, 255, 255, .5);
  box-sizing: border-box;
  cursor: pointer;
  text-transform: uppercase;
}