This game is great! I love vermis and I love this interpretation of it, but I've found a few bugs.
(SPOILERS)
After fighting the Stench Champion and getting infected, once outside I saved and once the status went away I still took poison damage indefinitely throughout the playthrough, this was only solved by closing and re-opening the game. I even took infection damage in the character select screen when I quit without closing the game!
Many NPC conversations don't reset between playthroughs, so I'll be on a new save and the frog knight will always be on their last line of dialogue - this persists regardless of whether or not I have closed the game.
I hope this helps!
Also it took me so long of traversing the flutewood forest trying to find the key to go inside after the Helmet's Beast before finally reading that its unfinished.