This is the code for the video "Ultimate introduction to Godot 4 [2D]" by Clear Code.
The code itself is CC0, you can use it for any (both commercial and private) project without asking for permission.

The art assets are from other sources:
Most of the artwork is from various Tatermand projects: https://opengameart.org/users/tatermand
Decals are from Dino0040 https://opengameart.org/content/100-grunge-brushstrokes-and-splatters-set?page=5
mouse coursor from Kenney https://opengameart.org/content/ranks-pack-70%C3%97

sounds:
explosion: https://opengameart.org/content/explosion-0
impacts: https://opengameart.org/content/impact
item pickup: https://opengameart.org/content/life-pickup-yo-frankie
laser: https://opengameart.org/content/shots
music: https://opengameart.org/content/battle-theme-a