Arite, I know I might sound a bit of an art troll, but a few things can be fixed.
A. The moon is a bit messed up. You could use a compass or any other circular object to draw that, instead of freehanding the moon.
B. After toying with other things, I figured out that if I used my Scissors tool on GIMP 2.0, I could easily remove your watermark. I'm just warning you, someone could use photoshop or GIMP, and easily remove it, and claim that they made it, without the watermark in the way.
I don't mind the trolling. I know I didn't really put too much effort into my moon. It is like, the lamest moon I've done. And I've never been one too worried about a watermark. I rarely put anything on my images really. I appreciate the critic though. Thanks