It should have puzzles. Would be cool imo

Randomize the player speed every time you die.

Make the difficulty levels unbalanced, where easy has god mode on, medium is the equivalent of hard, and hard is stupid difficult, and there could be an unlocked difficultyafter hard where its the same as hard but with perma-death.

normal difficulty a bit hard but not too much hard difficulty self-explanatory THY END IS NIGH nuzlock mode DOGmode a terraria journey mode like mode

the among us part could be more of a minigame that use the stylus, you use stylus to drag character and do task, there the command icons for venting and murder, also only base among us map, no roles beside crewmate and imposter

for items we could put for heal tomodachi life foods(same sprite), for exp maybe the ykw exp orbs, for the mana system(PPs?) use mitopia's salt

the characters class could be either pre-determined or choosen, and can change via items or maybe an NPC

pre-determined would be depending on mii's color blue= dark mage black= rogue/thief white= white mage yellow= paladin green= druid pink= bard brown= barbarian red= monk

in game my mii should be blue for the fact that I ALWAYS PICK MAGES, so yeah...

i believe pre-determined AT FIRST is the path as its basicaly the basis of the mii plaza games

maybe it could be a run-based roguelite RPG with random dungeons

maybe a cat inventory, like you can get up to 3 at start and with an npc you can increase the number up to 10, with a total of 50 cats