Nice job! Some moody audiowork is always appreciated and adds so much mood to ingame environments.
My favorites are JUNGLE (due to how alien and not-foresty it sounds), SUBWAY (great screeches, reminds me of the subway section in Yume Nikki) and UNDERPASS (great, suppressive atmosphere and fat basses)
I imagine these pieces are even more versatile if you fuck around with the playback speed and pitch in engine