* {
  margin:0;
  padding:0;
  box-sizing: border-box;
}

.game-board{
  width: 100%;
  height: 500px;
  border-bottom:  15px solid rgb(9, 104, 9);
  margin: 0 auto;
  position: relative;
  overflow: hidden;

  background: linear-gradient(#87ceeb, #e0f6ff);
}

.pipe {
  position: absolute;
  bottom: 0;
  width: 80px;
  
  animation: pipe-animation 3.5s infinite linear;
}

.mario {
  position: absolute;
  width: 150px;
  bottom: 0;
}

.jump {
  animation: jump 500ms  ease-out;  
}

.clouds{
  position: absolute;
  width: 550px;
  animation: clouds-animation 10s infinite linear;
}

@keyframes pipe-animation {
  from{
    right: -80px;
  }

  to {
    right: 100%;
  }
}

@keyframes jump {
  0% {
    bottom: 0;
  }

  40%{
    bottom: 180px;
  }

  50% {
    bottom: 180px;
  }

  60% {
    bottom: 180px;
  }

  100% {
    bottom: 0;
  }

}

@keyframes clouds-animation {
  from {
    right: -550px;
  }

  to {
    right: 100%;
  }
}