Oh my god, why does everything look so different after I played your game?! Crazy ;)
The atmosphere was wonderful and the game has a very nice System Shock 2 vibe. The hunt for the different endings was cool (I did ot find ending 4) and the graphics and especially the sound were great. But I have to nitpick that you have not implemnted the requirement: "The game must have combat or a similar mechanic for determining outcome of certain situations, enemy encounters and events."
But the game was really cool!