The BUG Described in CR-0139 - I have the lower dungeon key but game still say i do not have it - huge game progress not knowing that :-(
Viewing post in The Princess And The Tower (18+) comments
There are three floors and the third one is required to progress in the game. (the level with the spectral slime)
If you can send me a save game I'll analyze it.
If you are a patron you can post it on the discord bug channel.
If not, just put it up on some cloud drive (mega etc.) and send me the link here and I'll have a look