Actualy there is a very cool free game called Cookie Clicker, all what you need to do is make cookies 
You can change the code of the game to "cheat". This game is browser-based with real time management, to get so many cookies you need to click or leave it to run, if you have cursors, grannies etc
http://orteil.dashnet.org/cookieclicker/
We could make some competition or stuff
This game is still in development, although its a new game, so there isn't much, but for the new player is quite hard to get lots of cookies to buy many things
You can change the code of the game to "cheat". This game is browser-based with real time management, to get so many cookies you need to click or leave it to run, if you have cursors, grannies etc http://orteil.dashnet.org/cookieclicker/
We could make some competition or stuff
This game is still in development, although its a new game, so there isn't much, but for the new player is quite hard to get lots of cookies to buy many things