Since the operation of the iPhone4 is slow, I would like to improve the performance, although the coin pusher game is made with iPhone using Bullet.
The stand and pusher use kinematic btBoxShape. And the coins use btCylinderShape.
If 30 coins overlap, it is less than 30fps. If 50 coins overlap, it falls to (drops to) 10fps
Are there any good ideas on how to improve the fps performance?