A little running animation for Dr. Chromis:
<img src="http://xs124.xs.to/xs124/08061/chromis-run647.gif"> <img src="http://xs124.xs.to/xs124/08061/chromis-run_lg121.gif">
I'm not an expert pixel artist, so crits are welcome...
I'm not an expert either, but I think he looks maybe a little too clip-arty. I think you could fit a bit more personality/charm/distinct qualities into him, maybe by making him look a little worried or giving him a more distinct posture.
Other than that, I really like your basic concept. He's just a little too garden-variety, is all.
Oh, and I'm working on a platformer I like to simply call "Alex" using the physics movement. I don't have a whole lot done; I'm trying to perfect the movement/attacks before I get caught up in the visuals or level design.
It's similar to SNES-era platformers, but the idea here is to incorporate modern ideas to make the game feel less abstract and more "natural". That is, real world ideas have more application, enemies are more than just obstacles, etc.