I saw that you requested critique;
A few pieces of advice:

• The facial structure seems to be very inconsistent. I would suggest starting out with either a sphere or a cube, and then building the face from there. There are some excellent resources on this. Most libraries should have books covering how to draw heads/faces. Even in cartoony work, a solid grounding in realism can help significantly.

  • The same advice can be applied to other parts of the anatomy that are lack, such as the hands and shoulders.
  • It seems like your linework has a ways to improve. You could try practicing both this, and the aforementioned anatomy skills at the same time. A good practice tool would be to draw spheres and cubes, and try to form an accurate head out of those shapes alone. Not only will the practice help you realize the depth behind those structures, but it will also give you some valuable practice in your line-drawing skills.

I hope this critique didn't come across as too harsh. I look forward to seeing what you produce in the future. :D