[Drunken F00l]

The demoman at the bathroom is funny. The cashier's building still looks terrible. The pumps' awning looks kinda bright around the edges. The pillars holding it up also clash with the ceiling. You could also use some kind of transitions elsewhere.

Otherwise, it looks pretty good. It's easy to tell what the scene is all about.

Edit:
idea: If you make two gas stations, you could prolly turn this into a real map. Kinda like two fort, except with competing gas stations on two street corners.