I'm glad you're enjoying the game.
I had plans to add progression systems like unlockable traits for characters and loadouts and such, but unfortunately funding ran out and I had to stop production before I got there. If I come back to the game someday, that would be the first thing I'd add.
As is, difficulty just changes how hard the monsters are. And scenes are unlocked by lowering sanity or going on missions with girls they have pairings with.








