Time4Tea: That's a good point about saving/reloading. I don't like save-scumming in RPGs in general. One idea might be to limit each player's game to one save and not allow reloading unless a character dies in combat, to prevent players from undoing in-game roleplaying choices they have made.
I don't like it when a game tries to put any sort of restrictions on saving/reloading. When there's in-game roleplaying choices to be made, I would like to be able to reload and see the other paths that could have been taken. Also, I like to sometimes experiment, and I like to be able to reload (or quit without saving) after I do the experiement.
(Also, why should having a character dying in combat be any different, particularly when there's still a character with a revive spell still alive?)
By the way, I've also thought of maybe trying to make a Celeste custom map, and here are how I would answer the questions with respect to that:
* Biggest influences: Aside from Celeste (which doesn't really count), I'll cite Syobon Action as well as Mario Maker 1/2 troll levels and Super Mario World troll hacks.
* Genre: Obviously would be a platformer, but within that genre classification this would be a troll level (if you couldn't tell from my answer to the previous question).
* Difficulty level: Relatively low. Yes, the player will die (ideally in funny ways) to things they couldn't have anticipated, but they shouldn't have any trouble if they remember where all the trolls are. In particular, it's not going to require any advanced tricks not required for reaching the normal ending of the main game. (I did see a troll map, but it wasn't that good and did require advanced tricks; I'm aiming to be better.)
* Yes, if I make it and release it, it will be labeled as a troll map.