Hi, congrats on your game! :) I love this kind of game where you guide a ball down a track. Even though I've played many of them before, I always find myself wanting to try out a new game in this style. As for the game, you're on the right track, the physics seem to be working correctly. The only detail I would suggest reviewing is the difficulty. I found the game to be quite easy for a good portion of the beginning, maybe around 2 minutes. Perhaps you could consider adding some new challenges during that part of the game?
If you have some spare time, please try out my game. It's a classic space shooter from the 80s but with a personal touch. Please leave your honest feedback.