Here is a Godot project. It is slightly broken.
Please download Godot Engine from https://godotengine.org
Then please download this project and open it in Godot Engine. One way to download a project from GitHub is to click on "Code" then "Download ZIP".
Next, test out the project and see what is wrong with character movement. Can you fix it?
If you need help, you may reach out through https://gamedevsprints.com