Rollers for

From Windows-Help:

The game is constructed from a puzzle and 3 balls moving on the puzzle following the routes delineated on the puzzle elements. There are two types of puzzle elements: movable ones - if such an element is tapped with the pen or a button is clicked and there is an empty element next to one of its four sides it will move to the place of the empty element. The other type of elements are the unmovable ones. They are fixed on their places. The three balls move incessantly and their direction may be controlled by means of disarrangement of the puzzle elements.