In the first screenshot, the map just teeters off into oblivion. I suggest putting up a wall that fits in with the environment. Or you could extend the floor outwards but block off the extra space with more of those trailers, so you won't see that curious drop. Also, make the entity placement more natural. Maybe rotate some trailers slightly and maybe place those searchlights elsewhere. Good luck with your Rambow FPS.

I would like to share with you; my e-brethren, that I am making yet NOTHER comic that will soon fail!