Vlad,
Simulated universe necessarily proposes an intelligent designer separate from it's creation...
Intelligent enough to create
that universe, though whether that creator in turn would also be an inhabitant of a simulated universe of which it wasn't aware is unknowable.
..which maintains it's creation,...
Nope. You'd have no idea about that. For all you'd know this "creator" could have wound up the clock and then buggered off, died, whatever.
...who can intervene in that creation...
Nope. See above.
...and can change the creation suddenly by altering it's rules.
Nope. See above.
And even if you hadn't got all that wrong
still all you'd have in any case is a
hypothesis - an idea that could be right but cannot be (or hasn't been) validated. And there as many of those as you'd care to shake a stick at - why then pick just one of them, then jump the validation bit and decide that's it's true anyway, then mischaracterise it to have all sorts characteristics it doesn't have, then call the answer "God", then worship it if
not for blind faith?
Have I told you about my "assent" the the "gravity is pixies holding stuff down with invisible strings" hypothesis by the way?