Rebounding Football Game

[benlambe]

I just got sent a football game, for flash which lets you volley a football with your mouse. How would I be able to duplicate this interactivity. Basically, how the hell did they do that.

you can download it from:
http://www.footballaid.com/img/footballaid.exe

The root folder is:
http://www.footballaid.com/about/frame.html