How to add joystick to the FPS game.

My issue is to add an joystick to this micro game template.

I try to add a joystick to this FPS template , I used this free assets named Joystick Pack.
I saw this micro game has many scripts and is hard to debug all of these implementations.

Can you tell me if this is a good solution and how can I add the implementation of asset scripts to work with the player's movement?

In addition, the use of prefabricated types and the implementation of C # scripts in them require different access than in the simple case of attaching scripts, which makes it difficult to develop with micro games templates.
The prefab I added to Hub, see the next screenshot: