The only small suggestion I have would be to bring up the values slightly on the character's face and the floating object so that you have a greater tonal range in the painting, but it works great as it is
Oh and thank you for sharing the process on your blog, it's really interesting to see how you work.
tem que aparecer na 2d qualquer dia
Your creative talent shines right through the sunny clouds,
you did a wonderful tactical approach over this piece, I like it very much.