It's crazy how you managed to get so much complexity out of just pen, it makes me feel like I'm in the woods!
I'm sure your art teacher is going to adore it! Lolz, I just figured out that I can "like" posts. O_o I thought it was something Facebook-related like I see on other sites where you go to "like" it and it tells you to sign into your Facebook, and I don't have one. Whoops. :K