If I was omnipotent I could make the game specifically challenging in it's own ways for every single individual on a changing whim, while also knowing their full skillset and potential plus what they want out of the game. If they want it casual, competitive, for fun, screwing around, etc. If they want zombies, new IPs, shooters, MMO, what ever. And since I was omnipotent I could weave them in such a way they all work together for every single player. And the players would know the rules of their version because as soon as they're born they know everything they need to know about the rules of their game.
I'd also have a working anti cheat for once and GMs to enforce said rules to a certain extent (small dig at the industry here :P)
Except if God is truly omnipotent they can dumb it down to a point we can understand it or iunno increase our mental capacities. We aren't omnipotent so of course we can't explain every concept to a dog, but god could.