Anyone here played this game? I'm addicted to it! I hear that if you beat the game with all of the cars, you unlock Minion. Is this true?

Edit: I don't know WHY the heck my posts keep going in the wrong places. I definitely did NOT put them in other forums! I posted this originally in the Video Game section, and instead it appeared in the off-topic. The same thing happened to other posts of mine. ARGH!