I appreciate the kind words! Unfortunately, I did discontinue the project to focus on new stuff. I eventually stripped out the parkour movement to make a Unity character controller asset with it (which is one of the other projects on my page). Sorry if this disappoints you but I do appreciate you playing it.
It can be purchased from the Unity Asset Store from here: First Person Character Controller | Camera | Unity Asset Store. That is the only place I have made it available currently.
You can also try a demo with the full asset here with default settings, although pretty much anything about the tool is tweakable for the developer:
Character Controller Demo by Josh Peters (Jeezums) (itch.io)