Really awesome idea and very well done for a 48 hour game jam! I'd love to see a much more expanded version of this. It's so engrossing and I spent much more time on this than I was expecting.
I think I found the secret (is it spelling the 6 letter room and them wondering if they had one?) and if that was it that might have been a little underwhelming, especially after so many attempts. I do think the concept of the demon hand is really cool, but after the initial couple run ins it was really annoying since it's essentially an instant game over require you to start from the very beginning.
Otherwise though for a jam game this is quite excellent! Great work on this!!