Most often, new artists obscure the face out of fear of drawing the face, more than anything else. I'm not sure if that's the case here, but I'd introduce at least parts of the face, since that small of a hoodie wouldn't really obscure the whole face, would it?
I know the whole eyes in the dark thing is cool, but I've seen so many pieces using it that it quickly becomes a bore.
Besides, drawing a face will give you a better understanding of pixel art, as the subject matter of a face is full of interplays between light and dark, volumes, anatomy, etc. Drawing the human face is always a good art lesson. If you're not comfortable drawing a face from scratch, try getting a reference, a mirror or a photo camera to help you out.