UPDATE: Rewrite for 2017's worldwide release. Now with embedded tables!
Japanese version available region free on PS4 and XBONE. (Disc only)
2017: Worldwide, localized release for Nintendo Switch and PS4.
The highlight would be the swap mode, where your game of puyo puyo or tetris swaps every 25 or so seconds.
If you end up with the game and do not like guessing through Japanese menus here are translated pictures of the menus for your entertainment (or for a quick look) Pictures! Yay!