Great game!
Gameplay wise, this was one of the strongest aspects of the whole game. Jumping on cars and skating across the buses is very satisfying and enjoyable, and the little spin effects after every jump makes you feel a lot more awesome performing the tricks. There are some problems, the game doesn't really have much variance in the gameplay, as there isn't many variance in terms of obstacles, or vehicle types. I this wouldn't be as much of an issue if the game didn't last for as long, but as it is the game doesn't feel very exciting in the latter half, as I basically learned all the tricks, and the game didn't throw anything new that would keep me engaged. I think adding some new mechanics or features as you progress would go a long way.
Visually, the game was solid. I enjoyed the graphics, and as previously mentioned, the details of when you car bounces and does tricks were very well done. The visuals I did notice repeated a lot, which would have been fine, if again the game didn't last for as long. There were some unique structures, but I think adding something simple like, different grass colors, or a day/night cycle would make it feel like your progressing more.
Audio wise, the game was good. I don't think there is much to say here, other than all the sound effects fit, and were well balanced. The music was very pleasant too.
The theme interpretation was great. Easy to grasp, and made sense. I have no complaints.
Overall, a fantastic entry, that serves as a great base, for potentially bigger game.