This is the code from the tutorial you can watch on YouTube Join the Discord to discuss the turorial and game dev in general.
Each branch is it's own episode on YouTube. This allows people to check and compare code from episodes that are not the most recent one.
You are free to use the code as you see fit. It's public domain. Let me know if you create something from this. Maybe a school project or you managed to make your first game thanks to this tutorial. There will be a share section on Discord for this.