#global-screen {
    width:100%;
  height: 100%;
}

#game
{
    padding-left: 0;
    padding-right: 0;
    display:block;
    margin-left:auto;
    margin-right:auto;
    display: flex;
    text-align: center;
    position: absolute;
    top: 0;
    left: 0;
    background-color: black;
}

body,html
{
    background:0 0;
    padding:0;
    margin:0;
    height:100%;
    width:100%;
    display:block;
    background-color: black;
    background-repeat: repeat;
    background-size: cover;
    background-position: center;    
    background-image: none;
}
