use the arrow keys to control the car. park the car in the black box. V to switch vehicles. for the truck, park the trailer in the box. R to reset the level. B to go back a level. L to skip a level. (please do not do this unless you have to.)
big thanks to @griffpatch for his car tutorial! https://www.youtube.com/watch?v=IxmOs-Mjmy0 the winning, switching vehicles, and levels (except 1st one) are all me.