The nose is sort of odd. The nostril don't seem to be attached to the rest of the nose, making it look sort of weird. Try moving it a bit to the left so that they're closer together; that should fix the problem.
I don't know what you were aiming for with the ears; they look kind of off. You're going to want a good reference for them... say, this one: www.drawingcoach.com/image-files/ear_drawing_1.jpg
The upper lip should probably be more visible.
The shading looks a bit angular; you might want to smooth it out.
0nostril: I will
Ears: Idk, i didn't want any realism, but I will surely refine them
Lip:I like them that way .w. but maybe a little bit of meat could be added
Shading: Nah, I like it sharp