Gaz from Invader Zim

This pic is over a year old. This was a request for Invader Kimm. I had a ton of trouble with this. You see that black square. I would like to tell you it is a symbol of Gaz's dark soul but, that would be a lie. I erased and redrew then erased and redrew again, so many times that you could see the old drawings under everything., I couldn't erase it anymore. I threw it in a drawer and forgot about it. I came across it today and since I wasn't going to have any time to draw anything new I decided to finish inking it, hoping that it could be saved. It looks a whole lot better but I'm still am not that sure about it. Let me know if I should scrap it.