Need to find out gamepasses and premium payout benefits for "Admin" game

So my friend made a game where you watched a brick clone and there was HD Admin. Surprisingly, it seems as though his game hit the recommended page because he got some players.

He has now passed the game to me so that I can continue it. I added some niche featurers and now am thinking of advertising it on social media

One question is, what gamepasses or premium payout benefies should I include? I’m new to monetization, game design and also advertising (and keeping players) so it would be nice if someone could point me in the right direction.