It’s a game similar to Tetris, but it never made it to the final version released to the public. Apart from Stacker, the engineering sample of the iPod also has other unreleased titles like ...

An unreleased iPod Tetris game has been found on a prototype of a 3rd-gen model, controlled by the scroll wheel … The Tetris clone was found by X user AppleDemoYT, who collects Apple prototype ...