This is an AMAZING piece of art; the background looks so unique and has a great choice of color. Your technique is really good but there just might be a few things you could fix: For the hand that is holding the slice of cake, the sleeves are drawn so that it looks like they are in front of the hand instead of "wrapped around" if you know what I mean so you should extend the lines so that the wrist looks like its actually going inside the sleeve hole (did that make sense?), and the hand is too big I think...
Also the middle finger looks a little bit too long and the nose is just a little too off to the side, but otherwise it looks fantastic. The neck is probably a little too thick at the top, and the tines of the fork are...deformed? Some are thicker than others but thats just a minor mistake. I really liked how you colored in her clothes and drew her hair, and her eyes....so beautiful.....anyways GREAT JOB and hope you win the contest XD