style.css

* {
    box-sizing: border-box;
    font-family: 'Ubuntu';
  }
  
body {
  background-image: url('img/back.jpg');
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  display: flex;
  flex-direction: row;
  justify-content:space-between;
  min-height: 100vh;
  padding: 1vw;
  margin: 0;
}

h1 {
  font-size: 45px;
  color: white;
  position: relative;
}

button {
  background-color: rgb(0, 0, 0);
  color: #f78800;
  font-size: 25px;
  padding: 12px 12px;
  border-radius: 10%;
  margin-top: 2vh;
}

.controls button {
  background-color: rgb(0, 0, 0);
  color: #f78800;
  font-size: 1rem;
  padding: 2px 2px;
  border-radius: 10%;
  margin-top: 2vh;
  
}
#canvas {
  background-color: #4f4e4e;
  display: inline-block;
  margin-left: 1vw;
  margin-top: -1vw;
  margin-bottom: -1vw;
}

#gameMenu {
  background-color: rgb(174, 170, 170);
  border-radius: 5px;
  margin-top: 5vh;
}

.menu{
  display: flex;
  flex-direction: column;
  align-items: flex-end;  
  margin-right: 1vw;
}

.btns{
  display: flex;
  flex-direction: row;  
  align-items: stretch;
}

#gameStats{
  background-color: rgba(26, 26, 26, 0.591);
  display: inline-block;
  border-radius: 5px;
  margin-top: 1vh;
}

.controls{
  visibility: hidden;

}
@media only screen and (max-width: 600px){
  #gameMenu, #gameStats{
    margin: 0 auto;
    width: 40vw;
  }

  .menu{
    align-items: flex-start;
  }
  
  .btns {
    font-size: 20px;
    padding: 3px 3px;
    border-radius: 10%;
    margin: 1vh 1vw;
  }
}

@media only screen and (max-width: 1000px){
.controls{
  visibility: visible; 
  }
  .btnUp{
    margin-left: 10vw; 
    padding-left: 3vw !important;
    padding-right: 3vw !important;
  }
}