The goal is to eliminate
all balls in the board. The game will be end if there is
no more ball (You Win), or if there is no more
possibility to eliminate them (You lose). Ball will be
eliminated if there are more than one ball at horizontal
or vertical direction. Non-ball object is movable, but
it is not able (and it is not the goal) to eliminate
them.
For every level, there is a maximum number of step. Game
will be end (and you will lose) after this number of
step.
