Took me a while to realise there are different coloured spots on the road that affect how fast the car goes! That was a nice touch.
Visuals: I'd consider upping the resolution a little on your sprites, as the current versions are a bit hard on the eyes. Either that, or perhaps you just need to tweak the colour pallette. The silhouettes for the passengers, houses, etc are fine, though.
The current music gets annoying quite fast too, but I understand that probably wasn't a priority for this gamejam.
This is a good start, and I would play more of this if it was polished up. It would make a good mobile puzzle game.