Bossa Studios and Amplify have just released Twelve a Dozen on iTunes. The puzzle-platformer, which is aimed at a younger audience (11-14 year olds), has a mathematical focus. Comedian, actress and writer Lucy Montgomery is providing vocal accompaniment from the game's protagonist, Twelve. The game's out now on iOS (iPads 2+, iPad mini - iOS 6.0+) and costs £2.99.