Looks like you got the primary and secondary tag boxes mixed up with the title and message boxes, might want to fix that. ;)
As for the art itself, I think the lines are good, but the highlights are rather odd as it seems to come from all over the place. The colors are rather bland and straight black and white shading rarely, if ever, looks good. Try some more saturated intermediate tones. Also, it looks like you're going for a strong backlight, in which case it's usually just a sharp bright outline than the soft feathering you have here. Also, it's all coming in uniformly from one side. Try to think three-dimensionally, think of how the form of the body will influence the light...
yeah, I'm a bit obsessed with light and shadow. >_>
