Tiny World Builder

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Toys & Experiments

A creative 3D sandbox for building and exploring small detailed worlds

byJason Kneen

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Description

An interactive creative toy that allows users to build miniature worlds, join multiplayer sessions, and explore the 'Tinyverse'. It features a 3D interface for world-building with a guided tour for new users.

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Details

Why this is interesting: High capability signal: using AI to reverse-engineer game mechanics from raw video to create a functional 3D simulation.
Attributed to: @jasonkneen
Built with: GPT-5.5 Codex Kimi K3
Links: tinyworld.build
View tweet
Tags: #sandbox #3d-builder #multiplayer #tinyverse

First posted: X · Jul 6, 2026
Listed: Added 11d ago
Build: Moderate
Models: Strong

Prompt

take the video, break down the key frames, extract assets, textures etc and extrapolate into threeJS objects, then produce a replica that matches and loop until done.

Source