Yes, the lighting seems a bit dark but the layout & gameplay seem good to me. It's probably mixed though. Download if you wish.

@tehSandwich: Thanks for mentioning that :)

I actually understand the problem about the "glass" floors. It actually uses the stock Quake 3 fence shader which was made to shrink. Kafeewunder used it as it was, like if it weren't supposed to shrink. And due to how the engine does mipmapping with alpha-tested textures, it renders it virtually invisible from a distance.