Hey, thanks for checking the game out!
Yeah, there's a puzzle in that key room, but it's absolutely missing proper hints to clue the player in, which is something we gotta fix!
For now, there truly isn't a lot of punishment other than losing HP. We intend to change and refine both that and some more stuff in the post jam update for sure. I'm glad you got a little bit of what we were going for, though! And most of all, I'm glad you still managed to have some fun with it, despite the issues.
Thank you very much for playing!