Entire Game on One Screen you say? All right, not what I expected, but I can work with that. Here is the plan:

The game starts with a simple classic game, like pong. Very slow pong. Then, after some time another game is pushed on top of pong. Then another. Then another. All games run at the same time, so you have to constantly switch between the layers to keep up with the games.

Sounds good? Good.