style.css

body {
  background: url("./assets/starSky.png");
  background-attachment: fixed;
  animation: starSky 1s linear infinite;
  overflow: hidden;
  z-index: 1;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}

h2 {
  margin: 0;
}

.rocket {
  position: absolute;

  width: 50px;
  transition: 0.5s;
}

.ufo {
  position: absolute;

  width: 70px;
}

.boom {
  height: 50%;
  position: absolute;
  display: none;
}

.boom.game__over {
  display: unset;
}

.keyboard {
  position: absolute;

  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr 1fr;
  grid-template-areas: ". up ." "left down right";
  gap: 10px 10px;
  justify-items: center;

  top: 80%;
  left: 50%;
  transform: translate(-50%, 0);

  font-size: 25px;
}

.keyboard > div {
  padding: 10px 15px;

  background: rgba(255, 255, 255, 0.5);
  border-radius: 10px;

  box-shadow: 0 0 5px 2px black;
}

.keyboard > div > img {
  height: 100%;
}

.keyboard > div.tap {
  opacity: 0.7;
  box-shadow: 0 0 5px 5px black inset;
}

.keyboard > div:hover {
  box-shadow: 0 0 5px 5px black inset;
  cursor: pointer;
}

.main_key {
  display: flex;
  width: 30px;
  height: 30px;
}

.top_key {
  grid-area: up;
}
.top_key > img {
  transform: rotate(270deg);
}
.bottom_key {
  grid-area: down;
}
.bottom_key > img {
  transform: rotate(90deg);
}
.left_key {
  grid-area: left;
}
.left_key > img {
  transform: rotate(180deg);
}
.right_key {
  grid-area: right;
}

.keys_text {
  position: absolute;
  bottom: 17%;
  font-size: 10px !important;
  color: white;
  background: none !important;
  box-shadow: none !important;
  padding: 0 !important;
  margin: 0 0 10px 0 !important;
}

@keyframes starSky {
  0% {
    background-position: 0 0;
  }

  100% {
    background-position: 0 2049px;
  }
}