styles.css

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

.game {
  width: 100%;
  height: 500px;
  border-bottom: 15px solid green;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  background: linear-gradient(#87CEEB, #E0F6FF);
}

#pipe {
  position: absolute;
  bottom: 0;
  width: 80px;
  animation: pipe-animation 1.5s infinite linear;
}

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

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

#nuvens {
  width: 500px;
  position: absolute;
  animation: animacao-nuvens 25s infinite linear;
}

#gameover {
  width: 400px;
  margin-left: 100%;
  position: absolute; 
}

#atualizar {
  width: 50px;
  margin-left: 100%;
  position: absolute;
  margin-top: 350px;
  border: 0px;
  background-color: transparent;
  cursor: pointer;
  transition: transform 0.45s ease
}

#atualizar:hover{
  transform: scale(1.1);
}

#pontuacao {
  position: absolute; 
  top: 27px;
  left: 85%;
  font-family: 'Silkscreen';
}

#record {
  position: absolute; 
  top: 10px;
  left: 85%;
  font-family: 'Silkscreen';
}


@keyframes animacao-nuvens {
  from {
    right: -500px;
  }
  to {
    right: 100%;
  }
}

@keyframes pipe-animation {
  from {
    right: -80px;
  }
  to {
    right: 100%;
  }
}


@keyframes jump {
  0% {
    bottom: 0px;  
  }
  40% {
    bottom: 180px;  
  }
  50% {
    bottom: 180px;  
  }
  60% {
    bottom: 180px;  
  }
  100% {
    bottom: 0px;  
  }
}