I'm glad you had a good time with it! Thanks for the feedback; I don't think anyone's made it to the fabled 50th floor yet, so it's mysteries will remain guarded!
The levels are completely randomly filled, containing enemies and obstacles up to a number decided by your current Difficulty, so you've gotta use the Reroll to keep your Difficulty down, which also restocks all your abilities to help you get through a tricky floor. I may need to implement a minimum roll to prevent someone from being unfairly stuck with all 1's on their stats and not being able to save themselves!