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If you click with mouse button 1
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on a (destination) square then the following may happen.
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If
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- the destination square is on the same row or column as glenda, and
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- there is a ball next to glenda
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(in the direction of the destination square), and
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- all squares between the ball and the destination square
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(where glenda will move) are empty, and
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- the square next to the destination square where glenda will
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push the ball is empty too,
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then glenda will move to the destination square, pushing the
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ball while moving.
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Otherwise, if glenda can go to the destination square
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without touching anything, it will do so.
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Otherwise, nothing will happen.
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The breadth-first search algorithm should find a fast route.
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it can be seen in action by toggling the 'animate'
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entry in the button 3 menu.
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