this is one of the greatest sudoku simulators of all time. the rest of the game doesn't matter in comparison. the sudoku is just really good. being able to add "small numbers" in order to write down where numbers may possibly be, as well as zooming in on different elements to provide focus on the dual screens is just so useful. it's also fairly good at interpreting the number you're drawing, i hardly ever had problems with that. i honestly wonder if my rating for this would be higher if it was only the sudoku.