Somebody copied your work in my school, its up for display. It makes me really mad but who knows, maybe the objective of the assignment was to copy stuff.
It's pretty interesting. It's hard to simplify things and still keep their volume. You don't seem to use any soft brush, which is even more impressive. I like the texture you put on that painting, the only thing I could criticize would be that the hair seems a bit too black, and it flattens the painting, and it's quite a shame... But I really like what you do!