can you try to do similar to the last one buildings at an angle? I got a graphic novel book I think you ought to see. It's French, and called "The Night" It's on Rapid: http://rapidshare.com/files/54691814/La_Nuit_-__Druillet_.cbz It might give you some good ideas about future paintings. Here is one of the pages:
Also a free tip: I used to throw a little bit of glitter on my paintings at the sky part mixed in with the stars; that would create really cool effect. Try it.
Petkov, you have just given me that little boost I needed, thanks very much for that, I will try today , my paints have arrived ! ! Thanks also to the other comments.