This is very flat and grey. It would be a fairly effective shot with more contrast, and probably a tighter crop. It has a kind of subtle charm, but overall is a bit dull.
Quite a bit too dark for my personal tastes. It's just not very interesting to me. The placement of the sun within the photo is good. not having it dead center is a good thing in this case. I just wish there were more to look at. Good luck in the challenge.
Overall it's an ok image... it honestly doesn't "grab" me too much, though. Perhaps a little closer with a more detailed moon and surrounding clouds...?
A gloomy subject, and it gives me a gloomy feeling. I think that if the border had been about three times wider it would have given your picture more snap.