Telling me that someone's made fundamental changes to Tetris is likely to make me black out in anger. It's such a stalwart game and an institution that mucking around with it would be akin to colorizing Citizen Kane or changing Star Wars (ok, bad example). But truth be told, Tetris' earlier move to touch devices hadn't exactly been smooth, and changes were needed to make it enjoyable. This latest version succeeds enormously on that front, though with a huge caveat.