Car Visualizer isn't a game so much as a demonstration of what a browser can render: a detailed 3D car you can orbit, zoom and re-colour in real time, with reflections and lighting that respond as you move.
It's built with Three.js, the WebGL library behind a lot of the 3D you see on the web, and it's genuinely satisfying to play with — the kind of thing that used to require dedicated software.
No — it's an interactive 3D viewer built with Three.js. You rotate, zoom and re-colour a car model rather than playing toward a goal.
The most widely used JavaScript library for 3D graphics in the browser, built on WebGL. A lot of the 3D games and demos on this site use it.
Yes, though it's a real-time 3D render — older hardware will show a lower frame rate.