Build an interactive 3D browser sim of a Tesla Roadster made of jelly. Single HTML file; Three.js from a CDN is fine, no other external assets. Real soft-body feel: the body wobbles at speed, squishes on landings and jiggles when it hits walls. Drive with arrow keys or WASD, Space to jump, in a small arena with ramps and walls to bounce off. Glossy, translucent jelly look with good lighting. It should feel fun the moment it loads.