I am very confused about where this theme came from and what it's supposed to mean. I have an idea for it, but I want to hear what other people think of the theme.
I think that makes sense. I was thinking of making a game where you switch out game cartridges of an old game system and each one of them are different mini metroidvanias, and certain items or abilities will be usable across each of them.
Or each one of them is from a different time period, and if you make a change in one of the oldest games, it will also happen in all the others.