Works for me, I pressed whatever I could to get this to work and it did work eventually. Instructions are a bit lacking though. Hopefully the author fixes that, and maybe the malfunctions.
I think you have some tweaking to do. The airbag doesn't deploy until like 80+ MPH/128 KMPH.
Sidenote: I think this is one of the better destructible cars I've seen on algobox yet. The car destroys completely, is very detailed inside, and the crash physics is reasonably realistic.