hmmm- in the sharpening process you have made his eyes look very odd. If you go over this with a history brush the rest of the rest of the image would remain the same :0) awesome image tho!
Very good idea for the challenge. Well made. If I could mention one nitpick, it looks a bit "staged", sort of like he's trying to give the impression of "Ewwww!", but doesn't have his heart into it entirely (like he's gong to break out laughing in a moment or two). Love the totally white background. ~7