Alien sprite [now with side/back views]

[Coolio]

Hi everyone ! I have recently created this little alien sprite and would like some opinions on it.

       
2x

It actually started out as two different sprites (one had the head, one had the body), but for some reason I decided to merge them and am quite happy with the result. This was mainly done for practice, but I quite like the sprite so I might end up making a game out of it.
So anyway. Opinions? Improvements? I'm trying to improve my pixeling so that one day I might actually make a game that looks half decent. I've already learnt so much from just browsing around these forums, but there's nothing better than getting first-hand crits.
Thanks,

Edit: Added side and back views.

[Dr Fred Rubacant Edison]

Looking good


Btw    this is one of his buddys   

[Coolio]

lol, nice sprite Rubacant.
I had some spare time so I whipped up some side and back views. I'm still trying to decide what to do with the back of the head and eyes. At the moment he can look sort of blind, but just filling the eyes with the darker color doesn't seem to work either. Any ideas?

[Dr Fred Rubacant Edison]

the sprite is from a game called maniac mansion