This game is quite simple, more of a visual type. Basically, it's about what car suits a MLP character the best in your interpretation. Any character can be used over and over again, because we all have different ideas.
The game comes from a poll of mine, it can be accessed right here:
Player 1: What car Celestia would drive?
Player 2: *posts a pic and asks back* What car Luna would drive?
Player 1: *posts pic and asks back* What car Cadence would drive?
Oh, and the most important rule: Have fun!