This review is not to disregard my previous one. It is, in fact, to contest w'rkncrapper's, especially the last bit.
and no, you don't have to get rid of the tight spaces, everyone here are afraid of: Tight spaces, dark areas, monsters, deathtraps, open lava pits, and anything else that takes a little bit of skill to overcome. so go you!
Cheap ways to have a player die (ie- not caused by other players) on a map are instant map-credibility killers. Don't follow that piece of advice. Please don't.
Dark areas are acceptable if they are tempered with well-lit areas- relying on them exclusively will leave an annoying map and an annoying map alone. Tight spaces are almost always bad in net maps. They constrict flow.