A lot of the lines look messy; and I'm not just saying lines you outlined with, or lines for detail, lines that are important, like the ones that I can only guess are part of a circular support for whatever is above your character. A lot of this picture appears to be lacking in detail, I mean, I don't expect a sky so realistic that you'd prefer it to a real image, but it looks like it was rushed, and that almost never looks good. To be honest, I don't know if this deserves its own thread, but overall I can tell you tried.
