Sudoku

Whether you just want to learn how to play Sudoku or are challenged by tough games...
Three difficulty levels. Unlimited number of puzzles to solve in each.
Tiles that are left with one option only are highlighted
so you can breeze through them quickly.
Think-only-mode auto selects tiles with one choice.
Remembers every game you played. Select from history list to replay the same game.
See your win/lose statistics.
Guitar and piano notes provide feedback to your moves.
Silent mode lets you play at work, at night or in class.
If you still play Sudoku on paper sometimes, this one will definitely spoil you.
Can you identify the background music and the winning tune?
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