Once you begin the sport and enter the principle interface. In an 8X10 checkerboard, 2-3 rows of squares are randomly raised from the underside. You possibly can solely transfer one sq. within the horizontal route at a time, and there's house subsequent to the sq. to be moved.
Once you unintentionally transfer an error you may click on the again button to return to the earlier step
When you accidentally move an error you can click the back button to go back to the previous step