body {
  background: #000;
  margin: 0;
  padding: 0;
}
#game {
  /* margin: 20px auto 0; */
  display: block;
  background: #000;
}
#game:-webkit-full-screen {
  width: 100%;
  height: 100%;
}
#warning {
  display: none;
  color: black;
  width: 600px;
  margin: 0 auto;
  text-align: center;
  background-color: white;
}
@media only screen and (orientation: portrait) {
  #wrapper {
    display: none;
  }
  #warning {
    display: block;
  }
}
@media only screen and (orientation: landscape) {
  #warning {
    display: none;
  }
}