Until now, I never found a clicking game, which I found exciting. This however, is a very neat idea! At first I just wanted to see stage 2. Wasn't much disappointed when it didn't change visuals though). I still played until the crash dscottwilson described in his comment below.
What I would love to see is an automatic race which has a set end. If you finish the race, you get paid based on your performance. You can always upgrade your car and when you win the race, you can decide to enter the next one.
I think the game really has a lot of potentiol, if you want to continue it.