Play it! It's a great game and I can't really convey that it is a videogame at heart and not just a story-driven experience as I've detailed. I honestly think the themes of Celeste - anxiety, success, doubt, and the concept of individualism - are all exceptionally relevant to mafia players especially and I think it's easiest for people like you, me, and people reading this to actually connect with Celeste itself. I can outline this later if need be.
I'm heartened so many people liked the flavour!