body, html {
  background-color: black;
  height: 100%;
  margin: 0;
}

#canvas_wrapper {
  position: relative;
  overflow: hidden;
  height: 100%;
  width:100%;
  border-radius: 20px;
  touch-action: manipulation;
}

#game_canvas{
    position: relative;
    float:left;
    background: url(assets/images/background.png);
    background-size: auto 100% !important;
}