Regarding the time: Just wow!
I played the game and was like "ok, nothing special..works, nice design, no ending, okish entry". Then I saw you took only 4 hours only?! Regarding this limited time this is...huge!
The game is very short, yes. But it works! The collisions of the cars just seem to be a bit too much I guess. I like the art style also. I did not try that often, but I never was able to save all three people...however, I feel like you COULD save them? So... I don't know whether there is a secret so you actually would never be able to save them? (Just regarding the jam theme).
Overall: Nice game for such a short amount of time in development!