body{margin: 0 auto;overflow: hidden; background-color: #212121;}
canvas{margin:0 auto;}

 .rotation{
   width: 100vw;
   height: 100vh;
   float: left;
   position: relative;
   background: #212121;
 }
 .rotation img{
   position: absolute;
   top: 42%;
   bottom: 0;
   left:0;
   right:0;
   width: 200px;
   height: 200px;
   margin: 0 auto;
 }
 @media screen and (orientation: portrait) {
   .rotation{
     display: block;
   }
   #gameArea{
     display: none;
   }
 }

 @media screen and (orientation: landscape) {
   .rotation{
     display: none;
   }
   #gameArea{
     display: block;
   }
 }