This is an isometric saurface and a bowler throws a ball in that surface it will move like a half sine curve will create a fake bounce to the striker . After striker hits that ball the ball will go any where to the isometric ground in bounce like movement like impulse . It is possible but really dont know how . I used physics and impulse too but in this isometric surface it will only collide with a sollid sprite so the ball will pitch only on a single line (on the top of solid) which is not useful for this isometric ground . Please help! Thanks !