Your First Game from Scratch: The Pong Game - Learn GameSalad for iOS: Game Development for iPhone, iPad, and HTML5 - page 51

Racket Player 2
To create the racket for Player 2, create a new actor. Double-click this new actor
to edit it in the Actor Editor. Change the attributes as per the following:
 Name: Rack Player 2
 Size/Width: 16
 Size/Height: 120
 Color: White
 Physics/Density: 500
 Physics/Friction: 3
 Physics/Restitution: 0
 Physics/Fixed Rotation: Checked
Then create the two following rules:
1. A rule named Down. It will be triggered when the ''A'' key is
down (the condition). The behavior will be a Move with a
direction of 270.
2. A rule named Up. It will be triggered when the ''Q'' key is down
(the condition). The behavior will be a Move with a direction of
90.
Last, add a behavior called Constrain Attribute, with actor X constrained to 460.
Now, place your racket on the scene. You can place it approximately as the
position constrain will automatically position it correctly. Your Rack Player 2
editor screen should look like Figure 2-21.