Haha Yes! I am taking the course now, so I decided to develop the game based on the course's progress.
Star rating system sounds great! I am not sure how to save the player's data that can cross different levels, but I think I can start with the rating in the end of every level!
The two points are important! I will try to learn more about the physics and adjust the rotation as much as I can, and for the second level, I think it's good to adjust the camera view! I did find it's quite easy to hit the obstacles in a sudden, good point to change!
Thanks for the really detailed suggestions overall!! :D