Neat, just had a quick look, looks like you're making some good progress!
The pseudo-3D "tilt" of the ship is a cool addition.
In https://intrepidhero.itch.io/space-jam/devlog/290870/custom-drawing you mention an weirdness with PolyLine line width, you might want to check out the related known issues, of which there seem to be a couple: https://github.com/godotengine/godot/search?q=polyline&type=issues (e.g. https://github.com/godotengine/godot/issues/16466)