The classic game Battleships in a Bluetooth enabled multiplayer edition. There's currently no singleplayer, so you need two phones to try the game.
The game is the product of 3 weeks of part-time work. The game showcases our Bluetooth library called DustyTuba, which is aimed at developers who wants to quickly develop a Bluetooth enabled application, without having to spend time and effort on learning and utilizing the Android Bluetooth API. The library simplifies pairing and supports additional ways of connecting phones, e.g. Bump.
Both the game and the library is open-source and can be found here: https://github.com/omegahm/DBP2P