Dev builds hour-long Rube Goldberg marble run with GPT-6, physics at 240 steps/sec
mhmazur · x · 2026-09-14
Developer mhmazur worked with GPT-6 Astra to build a browser-based, hour-long Rube Goldberg marble run where a marble rolls, bounces and flies through trampolines, springs, ski lifts, parachutes, cannons and catapults, looping automatically.
Key details:
- Built with JavaScript and HTML Canvas; gravity, air resistance and collision physics run at 240 simulation steps per second, decoupled from render frame rate
- A course generator tries different track arrangements, simulates landings, and rejects unworkable combinations
- Author recommends fullscreen on a second monitor as a background show
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