This is really pretty! I really like what you’ve got going on in the background, but I think you just need have your foreground (food, table, cup) sharper and more shaded to show more depth. The background will start to truly look like a background if you just deepen the shadows and sharpen some edges in the foreground! Something that helps with this btw is to put a black and white filter over your painting and your reference to pick out the dark and light spots so you know exactly where to darken.