As the name implies, Lights Off is similar to the "Lights Out" electronic game that was popular back in the 90s. The premise is simple: turn off all the lights on the board. Touching a square will turn it on or off and will also toggle the state of the squares to the left and right, as well as above and below. It's a simple game with a nice, iPhone-native implementation, which is probably why it took second prize during the IronCoder competition. The game is free to download. Just as a warning, though, the installation requires using a "jailbreak" tool to access the filesystem as well as SSH access.