The game feel is really good. Driving just felt fun!
I think the stuff on top could be worked on a bit more. For example, it might be a good idea to have some more ways of gaining time back. I don't think that it's entirely possible to get more than two deliveries as the game is right no!
Obviously with the time constraints and everything, there's some stuff you just don't have the time to do. But what you have here is very fun! With some more polish and mechanics, I think this can be great!
Keep it up!