All of the scripts in this project should have GDScript documentation comments. The documentation that is generated with these comments can be accessed inside of Godot by pressing F1 and typing the name of the script in the search bar (e.g. "swipe_listener.gd").
All of the scripts should follow the GDScript style guide.
In order to make the code easier to debug, use Static typing in GDScript for variables, constants, functions, parameters and return types.