Recently the Music Hack Day Bologna 2013 happened. Nick Dima's contribution is a version of Tetris for Ableton Push that he dubbed TETRiSH. Yep, he built a playable version of Tetris. For Push. And put it up online.
That's what it looks like:
This actually isn't the first time someone attempts to bring to Tetris to a grid controller. Here's a video showing Tetris on the Launchpad.