It has a sort of Beyond Good and Evil feel to it. Pretty nice effects considering it's a quick painting. I'm actually more impressed at how such a clear and detailed image came to you in enough time to finish this in an hour and a half. Especially the play on subtle shades of grey in the background. It hints at activity while not actually showing it. Makes the whole thing even more mysterious and gives it depth (even physical depth! What is going on over there?) The craft almost feels like a stranger in a strange land, it pops against the stark scenery.
I know you didn't ask for a critique but I mean I can't screen everything I say.