If you like Sudoku, you'll like this game. It's quicker and easier than a game of Sudoku. But there's a bug in the code that drives me nuts. Every now and then, the game will CHANGE one of the numbers which I've entered. Change it from a correct number to a wrong number. Without any warning. If you're not paying attention you won't notice. Until you get to the end of the game, and your solution doesn't work. It drives me NUTS.