I agree that 'probability 0' is pretty neat for such a simple game. The concept is trivial and finite. The variations are endless. I like what I'm taking away from it though. Game design can often times start off so trivial that it's almost laughable.

Game Idea: Try to live as long as possible while constantly moving in a downward direction.

Added Complexity (The Features):
- Solid blocks which ...
- A monster which ...
- Ability which ...

I would love to experience the joy of comparing my original game idea to the final product design. I've never actually come up with such a simple one line game idea though. I'm always dreaming and envisioning new game ideas while also applying my standard must have features (mp, persistence, resources, upgrades, highscores, building, expansion, tech trees, and etc). Looking back, I suspect I've unnecessarily made a complicated mess out of a number of game designs.

My game designer mind has been coming down to earth for a little while now. I find myself spending more cycles thinking about games that can be simple or casual. After this "revelation", if you can call it that, I suspect a significant increase in this way of thinking.

I've been reading up on software architecture for the last week and it will be interesting to see how it impacts my game designs as well. :)

ts