Lately I've seen many 1D pong projects passing by, so I decided to make my own version.
Not just being a copycat, I really had to add a bit of extra mustard. In this case an entire TCP/IP stack! This results in a network connected 1D Pong game, in which you can have as many nodes (players) as you would like.

(http://http://phalox.be/wp/electronics/networked-1d-pong/)
It was another fun experience... writing a driver for the WS2812, getting our stack integrated on these wifi boards (you can't just make your own wifi driver because Microchip doesn't even provide a decent data sheet for the wifi chips), designing a UDP protocol, learning that decentralized behaviour is really not that easy...
Comments are welcome as always!
http://http://phalox.be/wp/electronics/networked-1d-pong/