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# Use the arrow keys (or the letters '''h''' and '''l''') to move the ball left or right during its trajectory; any other key will cause the ball to drop straight down.
 
# Use the arrow keys (or the letters '''h''' and '''l''') to move the ball left or right during its trajectory; any other key will cause the ball to drop straight down.
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If you have an XO 1.75 laptop, you can use the accelerometer to move the ball left and right.
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If you have an XO 1.75 or XO 4.0 laptop, you can use the accelerometer to move the ball left and right.
    
==== Multi-player game ====
 
==== Multi-player game ====