One thing you might want to keep in mind when making low poly characters is to keep it at 3 or 4 sides or verts per poly (preferably 3). I see in your eye socket it has 8 sides. Here is an example of what I mean:
Keeping things with 3 or 4 makes game engines handle it alot easier and also keeps your wireframe cleanliness up. The way it calculates things is based on tri's (3 sided polygons), so when you go to animate if you have more than 3 sides it will still calculate it as if it were 3 and place edges basically wherever it feels like it to conform to that. Which means you'll get crazy shadows going where you dont want them. Basically, just be careful on your wireframe and try to keep it neat.
Of all the conflict in the world, the one most interesting to me is Mario vs. Sonic.