Personally I am skeptical about whether it will be effective to use other games as the "bottom level" in the three-level structure of this game -- since other games aren't designed to be used as cogs in bigger machines it could be awkward, especially if aspects of [insert game here]'s design is touching on things that the "meta" levels in this game are trying to handle, so I would worry about friction between the different levels. But despite my skepticism I do think there's something interesting about looking at the different "meta" layers of the story/situation in the way this game does.