html, body {
    width: 100%;
    height: 100%;
    margin: 0px;
    border: 0;
    overflow: hidden; /*  Disable scrollbars */
    display: block;  /* No floating content on sides */
}

#canvas {
    /*width: 800px;
    height: 600px;*/
    margin-left:auto;
    margin-right:auto;
    display:block;
    
}

html, body {
    width: 100%;
    height: 100%;
    margin: 0px;
    border: 0;
    overflow: hidden; /*  Disable scrollbars */
    display: block;  /* No floating content on sides */
}

#canvas {
    /*width: 800px;
    height: 600px;*/
    padding-top: 50px;
    margin-left:auto;
    margin-right:auto;
    display:block;
    
}

Add padding at the top
Add padding at the top
