It looks pretty good, I just wanted to point out that line size and and thickness is very important when it comes to faces. The more lines and the thicker they are the older the subject looks. Kids have very few age lines.
I hope you don't mind but I grabbed the pic and thinned some lines out and removed a few lines simply to show the importance of line thickness. I also added a little highlight to the eyes. I didn't do anything to the hair, but I would suggest combining some of those little tiny cuts into fewer and bigger lines to make it easier to cut.
You did a great job with the likeness and with a little tweaking you'll have a really nice pattern.
Bob
PS. I did this real quick, I'm sure you will do better.
