If you like Sudoku or any other 'logic' game, you'll love LogiColor! You can make it as easy or as difficult as you like, all the way from 'Kids Corner' to almost impossible. Don't worry about having to leave a game in progress. All of your guesses and info are saved, even across a re-boot! The 'trial' version is fully operational. At the end of the trial period (7 days) you are limited to the easier levels of the game.