Two words
Action RPG.
The whole planet would be an RPG in which I play and control. And in the billions of years, when the planet needs to die(I beat the final boss), I just turn off the game before using another planet.
That's right... kind of twisted, but that's what I'd do. But if that isn't acceptible, I would instead wander around on Earth and other planets that have life, and scare people who just died by spewing out nonsense of stopwatched before cutting their heads off. (As I'll pretty much be the grim reaper, one per world, spread throughout all of creation) If my scythe judges them to be overall good, they'll go to heaven and forget about me cutting their head off. If it judges them to be evil, then they will go to hell and suffer.
Both outcomes would be highly possible if I were God, be thankful I'm not.