Not bad, but doesn't really bring anything new to the table. Not remotely worth paying for. You are kidding yourselves if you think your game is replayable enough to make buying extra maps worthwhile. Make a good game, enjoy your ad revenue and move on. You are making a simple little flash game distraction. There is no place for a cash shop.
Overly simplistic. Also, country selection when submitting the score is buggy. I selected country before giving my name and it kept saying I needed designate a country.
Needs better documentation. I figured out how to burn oil slicks by accident after several races and I still haven't figured out what I am expected to do on the canyon jump.