You should have TWO important things in mind...
1- Simplicity : you should make Among Us 2 players start simple and unlock new features with game play (basically don't throw in tons of game modes at once , show the player the core mechanics of Among Us 1 first then let them go)
2- Free to play , as a mobile player being able to play the game for free without paying anything is the only option (basically there should not be any features that affect gameplay that are locked behind a pay wall) , personally I can't support you directly but there are a lot of people who can by buying some of the cool skins or stuff like that.
Hope you make the game as soon as possible! It will be the greatest game ever!!!