Good:
-The car physics were good
-The particles were a nice touch
-environment was a cool shape
Improvement:
-tutorial screen automatically disappeared before I could finish reading
-no depth/texture on environment so it was easy to lose track of direction
-no ability to manually change view of the camera was frustrating as I had to move in order to look around
-there was a good direction as to what I was supposed to do, but no way to complete it other than wandering aimlessley around which wasn't very fun in my opinion.
Hopefully you can build on the work you've already done and the feedback here for your future projects. Good luck!