just shooting out an idea what if roomie fails a mini game and throws his phone down then Mia gets it and uses it to make roomies member bigger this could also branch to something like size play or even use the app to change the elasticity of her skin to accommodate for size.
or maybe add a clown fro to the gimmick shop for some clussy action.
also fire update.
also also not sure if you're open to ideas in your comments like this if not then sorry.