The program Lines-7 offers you the following possibilities: * Play to more than 45 levels of difficulty: from very easy for children to very hard; * Widely change appearance of game window: change: "skin", background and ink colors, scale of game field, opaque of moving tile. * Save and load a game; * Customize sound effect.

The license of this software is Free Trial Software, the price is $9.95, you can free download and get a free trial.