I think this last one is difficult - Arcade games would feel like a real world example that's limited by not being able to save the game and rougelikes usually have more fantasy to them and can save the game and take home etc

Am I a man who dreamed he was a butterfly, or a butterfly dreaming I am a man?

I think game worlds are more than just the idiosyncratic stuff driven from the developers experiences. Terence Mckenna's Time Wave Zero for example describes a phenomena known as the quickening. I think we have to pay attention to both like to just be aware that it's where the two worlds intertwine.