When I start the Pixel art I did the mouth, but I figured out later that it was cooler without it, if I had kept the mouth I would have notice earlier that the chin was a little weird, not well placed and too pointy. I'm going to change that, refine the AA a little bit, and probably change the shape of the border of the image :)
Anyway, thank you for your comment, always appreciated!
It's well drawn, good technique overall! Just one question though... why no mouth?
Thank you very much!