This is a classic Sudoku game that's designed to let you pick up and play whenever you have a little bit of free time during your busy day. Whether it's during your commute, your coffee break, or whenever you want to refresh your brain and get some brain exercise, this is the perfect game for you. Not enough time to finish a game in one play section? No problem! Your progress will be saved and ready for you to continue when you return. Feature List: • 500+ unique stages • Once you finished all stages in a difficulty level, you will gain access to unlimited procedurally generated levels. • Notes, Eraser, Undo, Redo functions. You won't need your paper and pencil. • Create a save point that you can return to at any time. Experiment with different combinations for difficult stages stress free. You know that you always have a clean state to return to with a button click. • When you are stuck, the Auto Notes and Hints functions are there to help you out. • Relaxing BGMs. We hope you will enjoy the game!