CasNum

The internet just stumbled onto CasNum, a passion project that turns ancient ruler-and-compass geometry into a way to do math—and then wires it into a Game Boy emulator so the console’s “calculator brain” runs on geometry. Yes, it’s as gloriously ridiculous as it sounds, and the comments are having a field day. Check out the GitHub repo.

The thread’s vibe swings between awe, confusion, and pure comedy. One user reposted the project’s tongue-in-cheek FAQ and the crowd fixated on the zingers: the eternal “can it run Doom?” meme met the deadpan “it’s a number,” while the line “I wanted arbitrary precision arithmetic, but I also wanted to feel something” had people nodding like it’s math therapy. Another commenter confessed, “I have no idea what is going on here,” capturing half the audience’s head-scratching while fans shouted, “Coolest thing I’ve seen in a while.”

There’s light drama over usefulness vs. art project: speed skeptics were disarmed by jokes like “faster than copying Euclid by hand,” as others shared learning links like this doubling the cube video. Meanwhile, the dev popped in—wholesome alert—to say thanks and ask how folks found it. Verdict from the peanut gallery: maybe not practical, but unbelievably delightful. “You can’t square the circle,” someone quips, “but apparently you can play Pokémon with Euclid.”