Free-form Creation myth
The game will be run as a series of 1:1 sessions.
Each players diety will essentially function as an NPC in each other player’s game.
Thusly each game will focus on you and your actions.
As for actions anything goes in game, you’re all gods so you’re able to act like it. See Greek/Egyptian/Norse myths for inspiration.
Other in game rules may be applied as reality and existence warps to your actions and the whims of the God of existence that created you.