Take a barrier and make it non visible, not on at game start, with it turning on when reviving car and turning off when receiving car off
Copy it at the edge of all roads
Make a garage that has a button that connects to a speed modifier for x4 speed. Put the barrier around the garage, so that you can go from it to the road
Turn on all barriers when it is purchased, and make a button pop up when that happens that says get out of car
Make it so that when the button is clicked all of the barriers turn off, and the person is set to 1x speed.
And there you go! A “car”!
(If anyone has an idea for putting a car image over the player, please put it below.)
You could make the path somewhat linear (This could help for less confusion while playing, and a car dosen’t necesairly move like a player!) This is a really great guide, with the game overlay, but you could try what I did with the skateboard! After all, most roads are right/left, or sometimes vertical!