Game or Asset Pack?

Engine Used
Unity3D 5

Genre
Arcade, Addictive, Racing

Did you pick any challenges?
Keep gameplay under 10 minutes. As the game is hopefully going to thrive of repetition - I feel I completed this challenge.
Use public domain characters and/or setting: I'm sure (& hope) my assets are public-domain.
Create your game in 1 weekend: Most of the game was made from midnight until 7am.

Closing Words
Playing games is rewarding, making games is so much more rewarding.