Thank you very much!
It's a shame that the game froze, there are a couple of nasty bugs that happen quite rarely and randomly, so they're quite difficult to spot. Did you by any chance pressed the merchant buttons more that once or something like that? Because in that case I'm already aware of that bug.
I totally agree with you on the rooms, they're always the same and mostly empty. I plan on adding much more content in order to make them more dynamic. Also, I really like the idea of tiles that give you advantages, thanks for the suggestion!