amarsahu9272/kineticParticles ? reverse-engineered prompt

Build me a playful 3D particle experience that runs in the browser and reacts to my hand movements through the camera.

I want the particles to feel alive in real time, expanding, changing color, and shifting behavior based on what my hands are doing. It should be able to switch between a few fun particle shapes like hearts, flowers, Saturn, fireworks, and other cool template forms, so it feels like a little interactive art toy.

Make it smooth and responsive, with a nice full screen view and a simple experience that works when I open it and give camera access. If it needs any setup or current docs to get the camera tracking and Three.js pieces working properly, look them up online and use the latest approach. Keep the app polished, visually striking, and easy to run locally.