Click any car to stop them from moving. Otherwise, they will randomly drive down the roads. If any two cars crash, you lose. Sounds simple, right? But here's the catch: There's three cars, you can only stop one at once, and they won't try to stop from crashing into each other on their own; They'll just drive around randomly regardless of each other's locations. Have fun!
2022/02/13 update: You can now click e to turn on easy mode, only on desktop for now, might add mobile button for easy mode later. Easy mode will only have two cars driving around instead of three. To turn normal mode back on, hit the green flag again.