A nice surprise! I had to say that we had almost the same idea at the beginning of the jam. But in the end we didn't went for it, since making a driving game in 3 days seemed too difficult ^^ Really cool aesthetics, the sprites are really cool, so is the palette. As others have said a bit of sound would round the game. (Btw, I was going to tell you that the endgame seemed a bit abrupt---I didn't knew about Desert bus. Now I know, funny reference to be honest xD).
All in all, good job :)