Critique then, as a record shot it's pretty good. Well exposed for a large, flat fairly bright area - there is still visible detail. Also, showing it cut in half with other samples around it is good for additional context and information.
Compisitionally it's almost dead centre but with the interesting interior bits off to the right I think you've got away with it.
Good quality shot too, I'd have not immediately suspected a camera phone.
So in all those respects it's perfectly fine - but in terms of impact/emotion it's rather dead. It interests me in a "what is it and what does it taste like" sense but after those thoughts pass, I'd have moved on.
I'm far from expert but don't think it'd do THAT well in competition