Submitted by: David K.
* To get a longer trajectory, aim to get the ball to fall on the end of
a sling that is opposite to the direction you want to go. Then press
the arrow that's opposite to the desired direction to pull the sling
to its max. Then move the ball in the right direction when the sling
starts to go the other way.
* When approaching a diagonally placed sling, aim to roll up it to gain
extra speed and height. Aim to hit it at the bottom of the sling and
leave it about half way up.