<i>This is a pure HTML/CSS3 animation that is supposed to look (and sound!) like one of those demos in the days of the C64 or the Amiga. There is no JavaScript at all involved.</i><p>It's an interesting demo, but as someone who has used a real C64, and watched the demos on them (this is better than C64 graphics, but definitely something resembling the capability of mid-80s era hardware), there's something about using several more orders of magnitude more resources to recreate the same effects that just doesn't feel right...