This is an excellent piece of artwork! The linework and the colours go perfectly together, and it manages to look incredibly realistic. The structure of the picture is beautifully detailed, as well.
I am not much of a drawer/artist myself, but I have friends who excel at art, and I have learnt enough from them to know that this is simply brilliant. Although, that said, like I said, I can't draw to save my life, so any piece of artwork amazes me, ha-ha. But the underlining point still stands. This is excellent, be proud of it