Creating a Game Menu and a Particles Effect: An Angry Birds-like Game, Part II - Learn GameSalad for iOS: Game Development for iPhone, iPad, and HTML5 - page 202

Refer to Figure 7-3. ''Relative to'' applies to the direction. If you select scene, it
will be compare to the referential of the scene. A direction of 90 relative to the
scene will go up. If you select actor, it will be relative to the actor. So if you
select 90 and your actor's rotation equals 90, the effect will be to go to the left in
the scene (90 + 90).
Figure 7-3. Gravity for the target
Repeat the same for actors Soft Block and Hard Block.
Let the Actors Enter the Scene
Drag and drop into the scene one instance of Target, one instance of Soft Block,
and two instances of Hard Block. Position and reshape the actors to
approximately match Figure 7-4. Try to position them on the right side of the
scene.
Figure 7-4. Positioning the target on the scene