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	Start button just to right of score.  Push once to start; again to stop with score showing; again to reinitialize.
 Preliminary scoring simply adds 8 points for every cannon ball
 that blows up anything (double hits benefit because they save time).
Drag vertical and horizontal controls to aim cannon (note: it can fire vertically from 0 to 90 degrees, and 45 degrees overshoots,
 so if you remember your undergrad physics, there are two angles for
 hitting the castle - high and lofty, and low and fast.
 
Push button to fire or reload.  
Arrow keys will zoom in and out on castle, and rotate the view.
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