Clean up and fix cars as they come in to your workshop. buy upgrades that cost 20 each with the money you have gathered, and be the best workshop out there.
sponge and lighting bolt are from google search. everything else i made myself this game has some bugs. one of them is that if "carDamage" is 3 not at the start of the game and you start fixing or cleaning the car, it puts "carDamage" to 0. if you have a fix for this please contact me.