So you've created a "reverse GTA", that's very interesting concept. I'd love to see you expand on it.

Quick thoughts

• Adding incentives to break the rules would make it more challenging. Like a time limit on transporting passengers, so the player may end up considering taking shortcuts across the pavement or speeding. 
• I felt driving was a little unsatisfying, a higher top speed and a handbrake would be a nice improvement.
• The pick-up/drop-off zones are too small, I had to park on top of the clients and I found parking at the exact destination very difficult.
• Keyboard controls felt a bit off, like the steering turned me to sharply. I presume it handles better with a controller?
• More rules to break would make things more interesting. Like stop signs, speeding and crashing into breakable props.
• It'd be nice if there was a UI indicator showing the current rules being broken (ex "You ran a red light").
  • This would also help those who make the mistake of assuming you should be driving on right side of road (I'm too accustom to it from US made games). In fact you should probably spawn the player in the left lane as a subtle hint.
• The map layout was a bit bland, you could take a look at games like 'Crazy Taxi' and 'Simpsons Hit & Run' to see if you can find inspiration to make it more interesting.
• Escape key doesn't close the game.