AS Test - Angle of Reflection

I spent so long trying to get the algorithms correct for this, trying so many different ways. Eventually the first way I tried to do it worked the best.
It's a tiny bit buggy but in most uses it should work alright.
I'm going to use it for an actual decent pong game.

Anyway, pressing any key will change the layout of the "level", click and drag to launch your ball. Arrows show up so you can see how it bounces around.

Press DOWNLOAD to view.

I put a lot of work into the algorithms for this, so if anybody tries to look at the code I tried my best to make it reaaaallly confusing