Target: Detect the impulse while the ball is hitting the border.

 1. Setup ChipmunkSpace, ChipmunkMultiGrab, DebugLayer and update as usual.
 2. Setup OcpObject to create the ball, tap the ball will change it's velocity.
 3. Setup Collision Handler to detect while the ball is hitting the border.
 4. When detect it, the background color will be changed and the sound will be made.