@CommodoreSpence oh no, I had nothing to do with it. it's *really* old. goes back to 1985. it's on the 1700-demo disk in C128 mode, option 3 'bounce' https://www.zimmers.net/anonftp/pub/cbm/demodisks/other/index.html
Takes a few minutes for it to draw all the sprites and positions into memory even with an REU. But fun once it gets going.