Neat! I think if you make the entire knight 1 pixel wider, right down the middle, it'll help you get a little more definition on the face, it's hard to get a ridge effect with 2 pixels, but should be easier with 3.
Also bit of highlighting on the helmet and right shoulder. Light is reaching down to the front of his feet, so it must be coming from in front of him, and high above.
OR, you could remove the bright highlight from the front of the cloak, and keep it just on the shoulders, helmet, to show the light is coming from behind-ish. That may help your clothes look more smooth too.
