styles.css

body {
  user-select: none;
  text-align: center;
  background-color: #011f3f;
  font-family: "Press Start 2P", cursive;
  color: #fef2bf;
}

h2 {
  font-size: 1.5rem;
}

#level-title {
  font-size: 3rem;
  margin: 5%;
}

.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;
}

.ins {
  display: block;
  margin: auto;
}

.ins ul li {
  font-size: .75rem;
  text-align: left;
  margin: 10px;
}

@media screen and (max-width : 576px) {
  body {
    width: fit-content;
  }

  .container {
    display: flex;
  }

  .ins ul li {
    font-size: 0.9rem;
  }

}