Are you still using only the mouse? If so, I'm impressed. Must take forever. How'd you get your shadows on that? Did you just draw them with line tool and then fill it with colour, or did you put another layer in and offset it or something? It just seems pretty spot on! ;)
I think you should give it some colour. Make that eye crazy scary or put some emotions into it?
OR you should draw the eye as if it's wearing glasses... and then it's like your Gentleman Doctor, just watching, and scaring the stuff outta you!
>:D