Very good game.
1) The camera auto moves back to start position, making get VIP's early more difficult.
2) Increasing costs eventually make the game too hard for smooth progression (at least in demo).
3) Fast lanes do not accept hold to accelerate, you need to click each time after buying expensive upgrade. For active gameplay, it makes better to not upgrade to auto/fast.
4) Washing cars gives more money, but clogs the traffic very fast.
5) Dedicated lanes become too sparse, while general ones get much more traffic. Also, moto/cars do not choose dedicated lanes. While a moto lane appears moto sparsely, motos still appear everywhere else.
6) Bulldozzer could be time limited instead of increasing costs...
7) VIP's being yellow makes them harder to see in larger fields. Perhaps a dollar sign ($) over the car would help.
Finished demo twice. I'll run it again now. It's addictive.