styles.css

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

#level-title {
  font-family: 'Press Start 2P', cursive;
  margin:  5%;
  margin-top: 20px;
  margin-bottom: 25px;
  color: #FEF2BF;
}

.container {
  display: block;
  width: 50%;
  margin: auto;

}

#rules{
  font-family: 'Press Start 2P', cursive;
}

a{
  color: #FEF2BF;  
}

#start{
  font-family: 'Press Start 2P', cursive;
  font-weight: bolder;
  width: 100px;
  height: 35px;
  background-color: #068DA9;
}

#score{
  display: flex;
  justify-content: space-around;
  color: #FEF2BF;
  font-family: 'Press Start 2P', cursive;;
  
}

.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;
}