My only criticisms would be that the shadows seem haphazardly, even randomly, placed. Many places where I would think would be a shadow is completely flat, and also do away with the textures. They're very distracting. Also, there's something weird going on with the eyes that doesn't sit right with me.
But aside from that, I have some suggestions:
I would change up the composition and angle. Also, maybe go for some stranger, simpler, and perhaps even less saturated colors on the boy so that the stuff that's coming out of the box stands out. (I love the harsh lighting though.) Maybe something like this?
Oh and just one more thing: the jpeg artifacts. D: