Vipershark sucks at spriting

[Vipershark]

So yes, I'm terrible at spriting, but this is the first completely custom sprite that I've made that I'm actually somewhat proud of.

Still a WIP, and obviously I need crits.


Ref: http://i38.photobucket.com/albums/e140/V...uruRef.png

Things to note:
1. Unsure if I should put any real shading since the ref doesn't have any. The dark parts aren't pillowing, they're actually outlines. The black lines were sort of a guideline and can be removed if needed.
2. I have no idea how to shade hair. At all. Can someone help?
3. If I add shading, the lightsource will be from an above-ish angle, somewhat like an rpg.
4. THE PALETTE IS NOT CORRECT YET. At the moment I'm using mostly colors from the SSB Project. I have to change them later.

Crits needed, EDITS WELCOME.