Ball world 2:Constraints

So ball world is out. It is in middle stage of testing and I hope that you all will help me with that.

For those who haven't seen Ball world 1 proceed here [link]

Ok now changes in controls:
Pause - now made by pressing Pause button. Space is not pause anymore because it is somehow used by flash button class.
Delete - as before you can use Delete key for that. But also ctrl deletes ball which you hold.

New things:
Save/Load - compression. Now saves are compressed but that may lead to problems. Problem is that this text is now recognized by windows as Unicode and I am not shore how such text will behave in browsers.
Constraints - there is new tool. Constraint. To add constraint chose constraint tool. Then click and hold on a ball you want to connect. Move your mouse on another ball you want to connect and release your button.
Gravity control - now you can control gravity. You have needed tool in left-top corner. Just use mouse wheel on it to change gravity.

Ok I will post save/load examples in comments.
I also will provide help video on youtube later.