This is very nice. The lighting is great, especially inside the mouth where it is a smooth gradient all the way back. Great idea for a picture too.
There is a slight feeling of pixellation or something, however (noticable for instance on the front face of the chocolate). Since the image is only 39KB, it is probably overcompressed JPEG, causing artifacts. Minus one point for that, but still this gets an 8.
the idea of it being inside a mouth was great but that was it! maybe too centered. i think you should have played with some lighting effect or something.
I just don't find a person's open mouth with food in it to be appealing at all. Sorry. The photo itself is technically fine, I think. Good focus and plenty of lighting.