Your drawings look like they're getting there. As they are, I think you could stand to spend a little more time on them. That scribbly look can be attributed to you not spending enough time on them or to a lack of confidence in your linework. Practice using precise and decisive strokes to give yourself a different perspective for a little while if nothing else.
Good colors to be using. I've said it before many times so I'll put it succinctly: don't color on white. Also, it looks like you're using the smudge tool to blend your colors; not a good idea unless you can pull it off with more subtlety. I think you can make a custim smudge tool in photoshop, put Painter's just add water blending tool is light years ahead of the game. Try it out if you ever get a chance.
Otherwise, not too shabby. I like the concept, but maybe a full body sketch would do it more justice. Keep at it. | 
