|The goal is to eliminate
all balls on the board. The game will end if there are no
more balls (You Win), or if there are no moves left to
eliminate them (You lose). Balls will be eliminated if
there is more than one ball on a horizontal or vertical
direction. Non-ball object is movable, but it is not
possible (and it is not the goal) to eliminate them.
For every level, there is a maximum number of steps. The game will be end (and you will lose) after this number of steps.