Really addictive!
So, as others have said, this game is basically Tetris, but sphered. Think a 3D Tetris.
If you are actually reading this, then you must be a puzzle game fan. So I see no reason why you wouldn't like this game. The presentation is great, there are lots of different modes and things to do.
The music is also well done, as well as the sound effects.
Again, if you like puzzle games, I have no doubt you'll enjoy this game.