Heya! The course is currently under development, so what's included at present is the source code for the demo as a whole as well as these chapters i've finished writing, which focus more on transitioning from Godot 3 to Godot 4 and explaining the new features and how to use them.
This devlog contains the content to be added, but the dates are innacurate: https://bramwell.itch.io/godot-4-beginners/devlog/362144/transitioning-to-gdscri...
Hope that helps c: