Thanks for playing and giving feedback.
I by rotating on the X axis you mean the roll axis or the pitch? Based on what you wrote, I assume you're talking about the former. I do want to change how the player handling works some more to better predict how and where the player is going to land and correct their rotation to make hitting slopes a lot easier. This might also help alleviate some of the bouncing off walls and corners. I'm also thinking of removing the invisible walls around the track and letting the player fall off either into the void or to later parts of the track if possible.
I will put air control back in, people seem to be falling of the track a bit too much. I meant to put in a way of jumping off railing, but never got around to it.
The underside of the track not rendering is an issue with Unity's shaders, I need to get a double-sided shader or create geometry under the track for it to render.
