body{
    margin : 0;
    padding : 0;
    overflow : hidden ;
    width : 100vw ;
    height : 100vh ;
    display : flex ;
    align-items: center;
    justify-content: center;
    background: black;
}

#game_container{
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

#main_canvas{
    display: block;
}

canvas{
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    
}

@media (min-width : 768px){
    #game_container {
        width : 33vw ;
    }
}