After a few hours, I finally got used of the controls. I also thought it was fun because the game has sound effects every time you win. Aside from that, it's very easy to play in the computer than on a puzzle book. Whenever you want to make erasures, your puzzle does not have to look messy from all the erasures. The Sudoku program also has an unlimited number of puzzles which makes it possible for me to play it endlessly. I can't wait to try all the games that the Sudoku on our computer has.