My preference is paper/pencil puzzles. I downloaded this to have something easier to keep me busy while waiting for my mother at medical appointments. I immediately turned the sound off so not to be disruptive to others, but when starting a new game the offensive music comes on with the ad that must be viewed for at least a few seconds. I play these games to relax, not to be competitive with other unseen people. There are two many stressors to keep this game from being fun. I don’t need a clock to race against, and would prefer that it could be toggled off. Plus, when a new game is launched, the clock starts and I lose seconds watching the ad before I can skip it. I don’t care how many mistakes I make, keep track if you must, but I would like the option to clear the board and start over like I do with paper/pencil. Inadvertent mistakes are too easy to do with an errant tap on the keyboard. I pay attention to whether it was a finger tap mistake, or a logic error. Too many logic errors I’d clear the puzzle and start over. Plus, when kicked out of a game, the offensive music starts again disrupting those around me. I don’t mind the ads, they are necessary when enjoying a free app, but sound off should mean sound off all the time. Let me enjoy myself playing the game without the sudoku police monitoring how I play.