The game demo Bret uses is based on time mechanic concepts developed in the 2009 game Braid by Jonathan Blow.

I am not a gamer but I downloaded the game over the weekend because of the talk, and highly recommend it, it's a real work of art with serious production values, and easy to download for Windows, Mac and Linux.

http://en.wikipedia.org/wiki/Braid_(video_game) http://braid-game.com/

It is very inspiring to see such creativity and the courage to express it from people like Jonathan and Bret.