I have about 50% of the racers in the game, but I have spent over 2000 gold spinning without winning a new racer. The odds of me not getting a new racer in 20 spins is pretty low, like 1 in 1048576 to be exact if the odds are setup fairly. They obviously are not.
So after getting to the point where I couldn't' go any further because I had 6500$ and no more minerals to mine I restarted. Then I got stuck in a rock about 15 minutes into game play. 2 plays, 2 serious bugs. 1/5 until this gets fixed.
Oh nice idea, a speed run thingy! I'll keep that in mind for the next patch (: