Played the game several times, I want to commend you for a design with lots of interesting elements that just works, and the excellent writing. Really had fun.
I feel that if one would like to expand this neat rogue-like experience into more of a rogue-lite one with persisting bonuses, it should be easy to do: perhaps Dracula and his servants do not want you to perish (as you are, after all, a food resource), and bring you back to your cell again (where you can start anew). A denizen (someone met on an earlier venture into the castle, or one you have yet to meet) wants you to succeed and leaves an item with you in your cell. Just an idea; not that the game needs to be something else, it's complete and fine as it is. Thank you.