Actually, the lack of shading seems to work in the drawing's favor, if you ask me.

Looks like an old Disney cell, without a background. Simple, elegant, shapely. I guess the fuzzy lines work for that nostalgia feel and lend itself to the subject as well.... how about a gif of this, with it's tail failing around in a cat-like manner?
It's butt and single, exposed rear foot look great at first glance, but I find myself drawn to it, because I'm supposed to be picky here, sry :3