£free (iPad) twolivesleft.com
The spiritual successor to Lemmings, Portal and Angry Birds, Cargo-Bot is an instant-classic puzzle game – enough in itself to make the Cool List. But this home-brewed creation of a self-confessed programming novice is the first game to be made entirely on an iPad, with the iOS app Codea (£6.99, iPad). All well and good, but set aside this game's Tetris-strength addictiveness and world-first cred, and you'll find that the real genius of Cargo-Bot is that the aim of the game – teaching a robot arm to move coloured crates around – subtly teaches you coding logic. Learn enough, and you might find the game you decide to program in next year's Cool List.