Thank you :-) I think you are the first comment who liked the ship controls I love zipping around in it... yes it's not kind of slow on the turns and has some inertia to it.
The Parallax scrolling is based on this article and code: https://pavcreations.com/parallax-scrolling-in-pixel-perfect-2d-unity-games/ And I think it's 4 or 5 layers of scrolling. The black background I attach to the camera and it moves with the camera so it stands still. I sometimes have the problem that each of the 5 layers shows the same pattern so they look weird in some configurations. To fix that I will rotate them each so they don create weird-looking patterns.