Nice stuff. Looks better with the crease gone.
I got that he was really high up (like, really, really, high -- it looks like there's quite a curve to the horizon! - oops, no, that's the city wall. I see the horizon now. Still pretty darned high.), but it's not clear what he's standing on. It looks like a grey halo around the tower.
It's got nice atmosphere, though. Does a good job at setting a mood. Not every painting has to be 100% detail.