This is probably one of the most elegantly designed games I have seen so far!
Similar concept to our game with the recording of cars but I was not expecting to see that applied to a more management-style of game but it totally works. Reminds me a lot of Mini metro with the minimalistic artstyle and the slowly zooming out camera revealing more houses and shops as the way to increase difficulty over time.
I guess the only thing I might be missing from that kind of game would be a bit of variation to kinds of cars maybe? Or some other way that the gameplay evolves over time. But of course, for a game jam I think it's more important to focus on a polished core gameplay loop than adding more features that will need balancing and testing, which I think you nailed!