artbava I added Physics to the ball and objects (that was the easiest way to make the ball bounce off of things). You can download the capx from the link above again to get the updated version.
Blue objects can not move at all, green objects are dense and don't move much. Yellow objects are light and move easily...
You will need to add Physics to any objects in your game that you want the ball to interact with. Since you are doing top-down, World Gravity needs to be 0. Your objects don't need the solid behavior (just Physics). Update objects Density, Linear Dampening, or other properties to make the ball interact the way you want...
It runs well on my iPhone.