I think this is looking good! It's looking really close. The main thing that jumps out to me is the perspective on the ear. The perspective in the photo is a bit more intense than on the drawing. I think there is also some perspective issue with the left eye, I can't quite place where it needs to go though, possibly up and to the left. But I'm not sure on that one. Overall the likeness is quite good and you did a fantastic job! Keep it up.