In O, you can literally change gravity.
It’s a tiny Mac app with adjustable physics for your desktop fidget.
I built it for ADHD-people who can’t leave anything untuned
Every year or two I remember what’s probably the most scarily/stunningly impressive linguistic feat I’ve ever seen. Every time, I think I must be mistaken, then I read the thing, and I just shake my head in disbelief. It’s been twenty years. Let me tell you about it.