Haha, I don't know why I keep going for tarot cards that often. I decided kinda fast that I wanted the items to be cards as it synergizes thematically nicely with chess being a board game and obviously after the classic playing cards, tarots are the first thing that come to mind. And they really offer a nice well rounded and decently numbered set of pretty abstract and versatile themes to plan the effects around.
The difficulty, if you can call it that, is just the enemy counts increasing and they getting more and more cards and effects. So the real difficulty really is all about what kind of random stuff they get really. There was probably some weird random error happening on the level/enemy generation, I gotta do some more testing on the higher levels. I didn't really test at 10+ that much at all really. You should have still at least saved some of your souls even if it froze as it does save that periodically?
But I still do like the concept of the game and plan on keeping working on it for a bit at least. Gotta still work on balancing everything better, fixing bugs and adding more stuff.