A really fun game a great twist on the classic tetris. The game's settings are worth diving into, turning on "unicolor" and turning off "popups" will help significantly with piece recognition and maintaining flow.
As of this review I've got a score of 240500 in regular mode, which is just enough to get me onto the top 10 of the current scoreboard.
The other game modes are also good fun and can provide a different kind of challenge. When you play any level you return to the main menu so expect a lot of menu navigation if you plan on playing the extra challenging "compact" mode.
Its a compelling game to play, especially once you have a handle it.