Smooth out the part next to the neck. Just use a little kneadable eraser to get rid of the dark lines, they're a bit too dark. It's fun though.
You're drawings are really great, a tip i'd probably give though is to not be afraid to go dark, when you have darker shades it makes the highlights pop. keep em coming
drawing
BUMP:
drawing
I pretty much finished that and turned it in for a grade. I think there could still have been a few fixes, like smoothing out the value change in the backround towards the left. CnC?
Also, I'll probably try working on something in my free time.