I'm not a tesla fanboy, but I'm glad I found this game/tech demo, love the simplicity, I start to like the hole electric car concept and this just accelerates my love for them.
Feedback:
Make mouse movement in vehicle move the camera around (and less sensitive when walking car to car to semi to car to, you get my point :-) I think)
Add the original design of model s (I prefer that since it has a face, yes I see faces in cars and the modern tesla's lack them)
Make the original roadster drivable, you got a model of it in game so I see it happen
And that's it really, in order of what I like to see first to last.