It's fun and works well; graphical layout & design excellent – Tic Tac Toe Pro HD Review

I agree with others that being able to wadi greedy the score would be useful. A simple work around is to quickly delete the app and then reload it. Scores are then reset. A faster method of resetting the scores is to go back to the first menu and change anything: for example change from 'Hard' to 'Easy'; then Quit the app and reload or launch it again. The Scores are reset to 0. You can easily the select 'Hard' again. You can reset the scores very quickly but having a button to do so would be better and very easy to program for the developer.
Review by Digital Wizards... on Tic Tac Toe Pro HD.