Alright, I finally have time to leave some feedback. So, in terms of the good things, is the fact it has voice acting, which is a nice touch for a jam, especially with a game this heavy in story, and it does introduce its mechanics well as a puzzle game, though some minor points:
- Narrator: some interruption sound for the narrator to maker when you don't let them finish like an "Oh." or "Hm.", so it flows a bit better. Also it could be nice to have the dialogs split up a bit more, so the narrator can return to what they were saying before, if they didn't finish it the first time. Another thing, during the ending sequence if you pick the button before the tape ends, the narrator will still say "Don't press the blue button", even after you already pressed the red one.
- Movement: A setting to turn of the camera bob, personally not an issue for me, but for some it might cause motion sickness, plus a raycast/shapecast check for the ceiling when crouching, so the player input takes effect only once you get into a spot where you can stand. Also something small, like a darker vignette when you're crouching could help the player realize what state they are in.
- Level design: while I don't have too much qualms with the actual puzzles, I would like to see either some more textures, or highlight around some edges when there is a hole in the wall, otherwise the player can just miss them completely since the rooms are dark, the walls don't have any contrasting patterns and those rooms don't have any light highlighting them, nor any dramatic light escaping them.