First of all, thanks for the lengthy review and your nice words:
"- custom engine vibes, rare in a unity game"
dunno if this a compliment or not ^^
"- does the game end? "
Thanks for noticing the bug, I forgot to reactivate a camera trigger there. Just to let you know, where you see the two purple "books" on the right there is a false wall, I always use that so I didn't notice. The new download has it fixed (you were near the end, and you can loop back).