Great soundtrack (and amazing production too, I'm glad that I listened to it with my headset to appreciate the subtleties of the mixing in stereo) !
I see where you coming from when you said that our stories were very similar (very different settings though, it was nice to see how you did the worldbuilding on your end to come to the final twist of it).
Concerning the tracks themselves they all had very nice instrumentation and arrangements with mixing that made them shine as much as possible.
I think my favourites were The Maintenance System (great buildup between the different parts, with its calm mood and more ectic parts I could picture what kind of game it would be and how dynamic the rhythm of the gameplay would be) and Pat's Song (great melancholic track to conclude the OST, reminded me a but of Shinobi III's Credits theme).
Overall excellent soundtrack, congrats for your great work !