This game has loads of potential. Really cool concept. The controls are difficult to figure out and get working, but after a bit it came together nicely. Maybe swap the “how to play” prompts with a static single screen to explain how to play.
A zoom out to see the whole area would be nice. Especially for when you run the coaster. Maybe add in an option to experience the coaster in first person. Attach the camera to the first car would be awesome.
Very cool prototype for sure! You should expand this into a larger project.