^ A+, Veoo.
Anyways, for whatever reason I always find this, very colorful, simplistic kind of anime cartoon head to be very pleasing to the eye. Even though it's a little rough, I love these kinds of heads.
Your shading and your black lines for the hair are very splotchy. I would go back and make those lines straighter, and less randomly placed in the spot you chose to put it. It's also a better thing to go back and clean up lines and colors that overlapped that shouldn't. Like your boarder black line for the hair, the green goes over and under it. It doesn't look right.