I love sudoku. This game, though, beats you over the head with ads. I have YouTube in a sub window - I pause it during the ad because it turns off the sound - I go to unpause it after the ad and (because I click off the game to do so) it makes me wait through another ad. Literally 1 second after the previous one played. It's an infinite loop. I hate this particular game. Don't get it if you like to listen to other things while you play, it's not good for that.