assuming Mastodon doesn't transcode it at all (_big_ assumption, worth a try), other #pico8 users who want to try my demo cart and look at the completely unoptimized algorithm can pick it up right here.

(token golf would trim this down immensely, but my real use will create three "bullet" objects rather than just make "draw" calls so I wanted to make this prototype as clear about the algorithm as possible and I will optimize it later in the real codebase.)