Tracing Bounces in Circle World

Yes, it does run faster directly in GF. Unfortunately, even optimizing your code (if it is even possible in any way) won't really make a difference because all uploaded scenarios run slower since the conversion to JS. You can even notice a difference at speed 50 which makes playing games on the site often easier than they are in GF.

@Hippo, I could probably determine the chord length of a completed line and, instead of moving (or drawing) 5 pixels at a time, move (draw) the entire chord length each act step. I would think that would help for the visual on the site.