After many attempts I finally managed to complete the game with what seems to be the best ending (SAVED). About 90% of my restarts were caused by failure to protect the teacher in the engineering section, and the fact that I always had to start from top area because of how physics work didn't help. >.<
(eventually, I managed to team up with 2 friends with weapons, so this - on top of my then level 5+ weapon - was usually enough to take down enemies from the get-go)
I liked the variety of enemies and their thematic patterns as well as punny names, though sadly - not being a native English speaker and not knowing some scientific terms in English - I couldn't quite get some references. On that note, I feel like Carnage Map would perhaps be closer to original and more punny than Karnaugh Massacre?
Some attacks felt unfair, especially when the opponent was slamming around the screen at high screen from unknown sides giving no time to react (I think binomial coercer was guilty of that?); maybe it makes more sense for someone who designed the patterns and thus knows how to reliably avoid them, but for new players it comes out of nowhere. Adding some telegraphing before the large scale attacks (like divider's bars) or quick body slams from offscreen (like the coercer) would make them better balanced, I think.
The exam conditions added some nice variation to otherwise samey fetch quests. However, the way physics exam is handled is somewhat unfair from the blind playthrough perspective - if you choose do the other exams first, you'll likely end up getting level 5, and then you just fail the exam right away (I also didn't catch the explanation during my first playthrough, so I ended up failing it on my next playthrough as well; and that's after I successfully saved the engineering teacher, too...).
I generally like the graphics, especially in terms of enemy designs; a variety of students is also a nice touch. Soundtack is among the high points of the game, though apparently many tracks are re-used, judging by the soundcloud history (e.g. Uncontained from over a year ago was used for SYSTEM)? I wish there was a playlist of tracks appearing in Prep School Horrors specifically, rather than having them spread over quite a vast soundcloud history... ^^'
I appreciate the inclusion of vocals on the last section before the final exam, though I'm afraid the singer still has ways to go to the professional level. I had hard time making out some consonants (I think it's particularly prominent with w/n/m/r?); maybe it's also caused by drawn-out vowels, which makes the boundary between them and consonants too blurry? Either way, I could only make out single words/phrases of the lyrics when playing, and when re-listening it on soundcloud I could only figure out about half of these.
(once again, I'm not a native English speaker and songs are usually harder to understand than regular speech; still, I listened to other English songs from some shows before, and I didn't have as much trouble making out the lyrics, except for occasional words or phrases)
One thing that irks me a lot, though: during physics exam, when I collect the proton, I collect the thing that orbits around the core, and when I collect the electron I collect the part of the core (I've completed the physics exam *many* times, so I'm pretty sure I'm not misremembering how it played out). Shouldn't it be the other way round? >.<
Overall, I've found this quite enjoyable and I like how it connects to other games ("There is nothing here" and "There was something here").
The engineering escort quest - especially combined with the low-level physics quest - was quite a drag, though, requiring frequent restarts to go for the best ending. ^^'