I'm not sure what I think of this game. I seem to play it a bit but I find it odd. Sudoku combined with tetris, only you can't turn the blocks like you can with tetris... You get 3 shapes and you have to fit them as they are. You don't get the next 3 until the previous 3 have been used so you can't plan ahead as you play. Because of this, it's a game of luck more than skill. You have to hope the game gives you blocks you can use, rather than think about how best to use them. I'd give 5 otherwise