Very nice thing you made, very nice. did you post the code somewhere?
I'm thinking on making 1 button games (you know, like those iPhone games). If you are interested, let me know on PM.
I would make follow things:
- intro screen (graphic with text)
- menu (with one button, you just let the choice rotate every 2 seconds and click when you choose)
I have 3 games in mind starting with one, will be hard enough

:
- Running man (jump in time by pressing the button)
- Downhill (evade obstacles up or down by pressing the button)
- shoot in time (shoot passing obstacles by pressing the button)