My totally original Play & Look game I made for the Shenzhen I/O review. The footage in the review was so short you can't really see the best feature, it speeds up.

I threw this together pretty quickly so I'm sure it could be made much more compact but I'm happy enough with it. There's no score display but execution halts when a ball is dropped which is the bare minimum for it to really be considered a game.

As you can see the ending is unfair since both balls arrive at basically the same time. There's probably a simple way to avoid this, maybe using prime numbers or something.