Stretchable Citrus Jelly Physics Simulation

Single-file WebGPU real-time soft-body simulation: a half-moon citrus jelly slice you can grab, stretch and release with a mouse or touch, and watch it wobble back. Inside are flesh, pith and rind zones, plus seeds and bubbles. Under studio lighting it shows refraction and light transmission. The video is a screen recording of a side-by-side comparison with ChatGPT-6 Astra on the same prompt, about 17 seconds long. Suited to physics-interaction demos and tech-focused short social videos.