There was a 3D game-in-a-game concept someone did >10 years ago called Nest - https://jonathanwhiting.com/ld/37/ https://jonathanwhiting.com/ld/37/ You use the

There was a 3D game-in-a-game concept someone did >10 years ago called Nest - https://jonathanwhiting.com/ld/37/ https://jonathanwhiting.com/ld/37/ You use the keyboard to control walking round some corridors to a floor. On the floor was some big Forward/Backward & Rotate buttons, and a large screen. The large screen in the game would show the game's opening screen, and you could use the in-game buttons on the floor to control the game-in-a-game. You could then navigate rather more slowly to the same point on the screen-inside-the-game. And then on that screen, you'd see your character able to interact with the same buttons on the floor, except now you'd have to navigate that character from 2 layers of controls deep. I don't know if there was another joke buried further in :)