I get an idea, get excited, open a new note... and three weeks later it's buried under twelve other "someday" projects.
Turns out most ideas don't actually fail. They just get forgotten.
I don't think I'm alone in this — so for Figma's Config Makeathon, I built
CITYDEA: a city where every idea you have becomes a building!
Give it attention — a note, a photo, a voice memo, a reflection — and it grows. Ignore it, and it slowly decays into ruins. Not as punishment. Just as an honest reflection of where your attention actually goes.
It's less "productivity app" and more a quiet, honest record of what you actually cared about, and for how long.
Built with Figma Make, Figma Weave (for assets), Figma MCP (w/ Codex) and Figma Design w/ Agent (for iterating on design system). I also use Antigravity IDE and manual adjustment for final polishing.
The way the oversized promise carries through the pink palette is really effective—the close-up crops make the car feel immediate without losing the campaign idea.
The low-poly scene already has a strong sense of place, and the 60fps browser target makes the interaction feel ambitious in the best way. I especially like how the restrained palette lets the “Explore the Silo” typography lead the experience.