A CAPTCHA you play: instead of clicking traffic lights, you walk a procedurally generated voxel world in first person and catch wandering creatures to prove you're human. The idea is impractical as actual auth, but it's a sharper joke than most jam entries because the proof-of-humanity is a real game loop rather than a gag screen. Buildless Three.js with touch controls, so it loads straight off GitHub Pages on a phone.
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