Squash the Creeps in Godot 4 (C#)

Squash the Creeps 3D is a free and open-source game demo for the Your First 3D Game tutorial in the official Godot documentation.
Unfortunately the documentation has not yet been updated to reflect changes made in the version 4 of the Godot Engine.
Moreover the official repo contains scripts written in GDScript, while this repo focuses on C#.
As a person completely new to Godot I had to understand how to adapt the tutorial to the new Nodes and methods definitions. I hope this repo can be useful for other people learning Godot!

Credits

art/House In a Forest Loop.ogg Copyright © 2012 HorrorPen, CC-BY 3.0: Attribution. Source: https://opengameart.org/content/loop-house-in-a-forest