body {
  margin: 0;
  background-image: url("images/Pixilart-Stars-by-Ficecco.png");
}

button {
  color: blue;
  border-radius: 10px;
  margin-left: 600px;
  background-color: #9370db;
  border-color: blue;
  padding: 10;
  font-size: 20;
  font-weight: bold;
  font-family: "Common Pixel", sans-serif;
  margin-top: 6;
}

.hearts {
  height: 30px;
  width: 40px;
  padding-right: 6;
}

#heart-container {
  padding: 0;
  margin: 0;
  display: flex;
  list-style-type: none;
  position: absolute;
  top: 10px;
  left: 10px;
}

.invulnerable {
  animation: blinker 0.25s linear infinite;
}

@keyframes blinker {
  50% {
    opacity: 0;
  }
}