I found a game a while back where you could program robots to fight other ones, the only problem was that it was very old and the website was abandoned years ago. Apparently, someone took up work on it again and its now back up!
The programming style is not at all logical (or perhaps too logical), but it is quite fun and i think a lot of people may get sort of hooked.
Heres the website:
http://botbattle.alwaysdata.net/
Enjoy!