Kickups (Hacky Sack) Game help

I am trying to make a Hacky Sack game like http://www.spikything.com/games/kickups/. I have followed the gravity tutorial http://www.bit-101.com/tutorials/gravity.html which only lets you pick up the ball and throw it. Does anyone have any ideas on how the ball could be hit to do kickups?

I’ve attached the fla if anyone wants to look.

Thanks for your help,

Andy