You've piqued my interest. One minor question, though...

What exactly are we supposed to be doing? I get the whole devil gangster/mafioso angle, but what's the overarching plot or goal? Or is it just sandbox? Cause of the latter you'll probably need to give more lore or info so we aren't contradicting the tone you've already established. And also checking sheets since what could fit the story is highly subjective to each player, and might range from demon to MLP "inspired" OC.