My only complaint with the coloring is that it's a bit on the dark side all around, and the green apple seems a bit off. I like the lines, but some of the stuff seems forced like the snake's position that Helm pointed out and the guy's arms and legs. The legs almost seem to be switched around, but that could be a shading issue.
Despite what it may seem, I was really in awe of this one. A hearty congratulations to both of you.