Oooh I had a lot of fun with this game. Driving feels pretty nice and the map is fun to navigate. Very clear instructions and goals as well - you even have a minimap!
One balance note I would mention is - consider making the side objectives mulitpliers that can stack instead of flat $. This way going for all the side objective within the limited time would give you exponetially more $ - which is much more accurate to the skill required to pull that off.