It's okay, I feel like my grandma could play this game though. The end was friggin stupid.. I hated that the most about the game.
I think there should be more powerups, and the ability to get more than just one upgrade if you have the cash in the shop. Maybe nitrous, faster speed. Also, I think the other cars speed should vary. They're too easy to dodge. If there must be a bomber, make it a plane that actually carries bombs. And make it able to swerve too, like chase you. I think the one line of road gets really boring really fast. there should be some turns, maybe lightning that you have to avoid, or downed power lines or trees in the road, causing a traffic backup. Maybe add pedestrians.
This is a good start to a great game, therefore I give it 2 stars.