styles.css

/* Font */
@import url('https://fonts.googleapis.com/css2?family=Combo&display=swap');

/* Body styles */
body {
  font-family: 'Combo', cursive;
  text-align: center;
}

.game {
  width: 600px;
  height: 200px;
  border: 1px solid black;
  margin: auto;
}

/* Animating the Trex */
#dino {
  width: 50px;
  height: 50px;
  background-image: url(img/trex.png);
  background-size: 50px 50px;
  position: relative;
  top: 150px;
}

.jump {
  animation: jump 0.3s linear;
}

@keyframes jump {
  0% {
    top: 150px;
  }
  30% {
    top: 130px;
  }
  50% {
    top: 80px;
  }
  80% {
    top: 130px;
  }
  100% {
    top: 150px;
  }
}

/* Animating the Cactus */
#cactus {
  width: 20px;
  height: 40px;
  position: relative;
  top: 110px;
  left: 580px;
  background-image: url("img/cactus.png");
  background-size: 20px 40px;
  
}

.cactus-animation {
  animation: block 2s infinite linear;
}

@keyframes block {
  0% {
    left: 580px;
  }

  100% {
    left: -20px;
  }
}

/* Controls and buttons div */
.controls {
    margin: auto;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-top: 20px;
}

button {
  text-align: center;
  font-size: 12px;
  padding: 8px 15px;
  border-radius: 10px;
  background-color: rgb(27, 27, 27);
  color: aliceblue;
}