Wow, this was really good. Definitely my favourite of the jam so far, as far as puzzles/deduction are concerned. Figuring everything out was very involved, with a lot of cross-checking and interpretation required - I definitely ended up needing to make notes on paper - but it was definitely fair, and I beat it without the walkthrough. There were lots of really satisfying "Aha! moments" throughout, although there was at least once where I sorta guessed & had my guess confirmed by the UI, which is maybe not ideal.
All of the deduction was very grounded in the setting, rather than seeming forced or out-of-place, which I think is important. It had a very cohesive feel/atmosphere, and everything came together satisfactorily in the end. The art and audio are solid as well.
Overall, an amazing game!
PS: The web version didn't work for me in Firefox on Linux; the screen went black after I left the wardroom at the start of the game. But I was able to run the Windows version successfully in Wine.