Touch Swipe in Edge

I used the script from TimJaramillo for my edge file and it worked!!

http://www.timjaramillo.com/code/edge/swipe_v2/swipe.html

But I still can't figure out where to put sym.playReverse() code.

Can someone tell me exactly where to place the sym.play() or sym.playReverse() code, if I simply wanted the animation to play forwards or backwards when swiped left or right?

Also, is there a way to speed up the swipe action. It's alittle slow.

THANKS