Nicely done! I figured it out relatively quickly, but then again these are the types of games/puzzles that I always prefer to make so it all seemed very natural to me :D I assume you can somehow die of mind corruption/bodily exhaustion (since those kept popping up) but I didn't really see any particular way to achieve that.
That said, there might be a slight bug with your 'restart' in that it might not fully restart things? Like I researched until I could no more then went back to the eye room and died to the screamy-scream, but the next time I went back there and selected 'undo the protection circle' it told me I could easily do it because of all my time spent practicing the weave of rah (even though this was a new run where I hadn't practiced anything). Just a note.