The field of ideas is separate from what we call reality, so in any case, I was not considering Plato. It's quicker to turn the problem upside down.
In the context of a videogame, I am my avatar. I might be picking my nose while the avatar nukes a city, my behavior has no whatsoever effect except for my inputs to the game. So, are we going to call real my nose picking, which cannot be detected at all and has no whatsoever bearing to the action, or are we going to call real whatever happens in the game? We are going to choose the second. Our reality is still important, it is the only thing that permits the videogame to exist as an abstraction. just like the kingdom of a god has bearing in our reality, if any exists.
Or let's consider a simulation, a game of chess. the universe in the game of checkers is the board, from the point of view of the pawn, that is called reality. Interactions have definitive consequences just like real stuff does for us. In fact nothing else is real for the pawn, we sure are not real, because in the abstraction called a game of chess, the nature of the player is irrelevant, there are only moves.
Reality for a Conway's game of life creature is about cells being empty or full, nothing more, nothing less is real.
Reality for us is all the things we can directly or indirectly or potentially experience. What makes reality behave like this? an ARBITRARY set of rules and who knows what more. A god behind those rules? we cannot tell.
Reality is the name given to an abstraction by agents belonging to that same level of abstraction. Simulation is what has one more level of abstraction. The creator hypothetically resides in one less level of abstraction.