It'd be cooler if it was longer, along with more levels and mechanics. Like maybe if you got caught, you would have to say the right thing to keep them away or something. If you put a lot more mechanics, levels, and maybe even different goals to the game, it could probably worth a few bucks, depending on how much you put in there. That's about how much I'd pay anyway.
Maybe add some missions, such as:
Keep all the cars alive for this long,
Kill all other cars EXCEPT these ones,
Keep this car from getting depressed for this long,
 "Transformice"){kind=icon}
 "Aqua Boy"){kind=icon}
 "MARCH"){kind=icon}
 "Tale of Scale"){kind=icon}
 "No,Birdie,No!"){kind=icon}
 "Mini Dash"){kind=icon}
 "Chubby Ninja"){kind=icon}
 "Roadeo"){kind=icon}
 "Flight"){kind=icon}
 "This is not a minimalist game"){kind=icon}
 "Spurt"){kind=icon}
 "UPGRADE COMPLETE!"){kind=icon}
 "Learn to Fly 2"){kind=icon}
 "Burrito Bison Revenge"){kind=icon}
 "The Love Letter"){kind=icon}
 "You Are The Road - Molyjam 2012"){kind=icon}