Simple and cute
Not a bad piece at all, I like the simple style.
OProblem with such simple style is that people often figure they can get off without detailing their piece. Sure enough, you don't need as much detail, but it's nice to see effort put into it.
I especially liked your shading on this one, and the shine in the eyes and on the shoes. I think you might have gone a bit overboard on the shine in the eyes.
The arms are a bit short, and the hands are a bit big and don't look too good. Looks like you're going for something like an american chibi style or something :P