That's pretty cool, but I don't think I'm digging the checker hair though lol. Maybe you should try and add another shadow that's inbetween the dark shadow and the skin color. It'll definately bring out the ears more, and the jaw could be seen better. Right now it's just a flat transition from the neck to the chin.
I'm assuming you're using the cell shaded version of this script right? It looks cool so far. I should probably play around with it too, looks fun.