I think any serious answer would be preposterous and probably irrelevant. Even if it was spot on. Let's say we could prove we live in a computer simulation. Would you really stop living your life? Would you try to talk with the admins of the universe? Isn't that a bit pointless? Reminds me of the South Park episode where they discover the Earth is a giant reality show for aliens.

And who created him?

it moved on to create the next trillion parallel universes