I think it looks like you have put more details in glass bowl with the brain in it . You should try to even it out a bit .
If you wan't to know how then just ask . There are several things that can be improved or changed . Becuse of that I would say that it is an wip .
Still , I understand that you just made this for fun . So my only tip will be keep making stuff and then you will learn how it's done from there . :)
Good sprite for a game