Well, maybe they are not too loud for anyone else.

Just tried it.. We definitely need high beam headlights. As of now, the range of low beam that good for cities, just too short for safe driving on a highway.

I think one second delay while the engine starts should be sufficient. No need for a car keys :-) or additional keyboard keys here. Though engine start sound would be nice.
Also the car reverses now without delay as well, while you hold the break/reverse key, which is kind of weird. Should have to release and push again that key to start moving back after the stop.