Love Hades, looking forward to seeing what you come up with!
Things I'd like to seeChoice of Weapons: have a handful of core weapons to choose from each time you play and this is the foundation of your character build. I also wouldn't mind an actual character choice, so you're not always playing a Zagreus equivalent, you might also play Meg, Thanatos, etc.
Progressive Powers & Upgrades: you don't start a run with a lot of powers, instead you have the option to gain one after each competed chamber; it's be nice if this was semi-random but still weighted towards building on your choices in prior chambers so you can focus on a particular style and skillset.Challenge Chambers: a mix of scene types, so there are some vanilla fights using the basic rules, but then also some special scenes where an additional rule applies, e.g. you earn a special bonus if you don't take a hit or you have a limited number of rounds to kill all the foes in the room, etc.