No problem, I was genuinely intrigued by it.
About the bug I found while opening the first wall - I probably interacted with the wall, opened the book, clicked on the glyphs and deactivated the wall - all while the initial interaction dialogue was playing. So it probably left me in a non-responsive state. Considered that players are likely to experiment a bit there it may happen again :P
I was a bit puzzled as you could only do much with just 2 glyphs, but then Arx Fatalis came up to my mind ;)
2) Win11, but I'm developing with Unity as well on the same rig, so I'm quite sure I didn't have V-sync forced Off in the nVidia settings
4) You're probably in gamma colour space so it's probably just how the torch lights the book. Maybe you could have 2 different lights on the torch, a dimmed one for the book, and the standard one affecting all other layers? Just a quick and dirty idea :P
5) It's really just at the beginning, when the music is particularly dominant - you can only appreciate one thing at a time :)
6) It's nothing major, I've been picky. The script was almost flawless - a few item descriptions left me wondering. I'm not a native speaker myself so I understand you're up for a challenging task!
Keep up with the great work - I'm looking forward the next update.
PS: I'm not sure if it fits in the game, but if you keep having such large environments you may want to consider a sprint key in open areas - and just walking elsewhere? I understand that running may ruin the immersion, so you maybe a "fast walk" would be more appropriate then a "run" key. I'm not sure myself - you'd definitely not want to add any UI for stamina or run so... Up to you to experiment if you haven't already. I saw a few gameplay video and I believe someone was crawling in open areas, or running wildly down some stairs. I wonder if keeping track of "sanity" would keep the player a bit more on the edge...
7) One last thing: pacing. I'm realising only now that the character is a bit... speedrunning between quite some scary events, especially at the end - I'd be quite shocked if I had those visions. I can't tell how, but maybe we could add a bit more drama to such terrifying events? I'm not a writer so I don't have any suggestion on how to manage that. Bigger environments? reduced walking speed? Passing out? (fade ins/out). I did inspect everything around, but someone could just skip the hints and the mental state of the character entirely? Just my 2 cents.