I would suggest you to correct the code, as the current code is not going to do any changes to this game.
It maybe a generic format for most games, but this game doesn;t use any variable "mcname" or "player_name"
Moreover, there are 2 variables in your file.
The code in your attached file zz_patch.rpy
Code:
$ mcname = renpy.input("What is your main character's name?")
$ mcname = mcname.strip()
if mcname == "":
$ player_name="Max"
This is not going to work, but simply popup every time the game loads.
On that Note: I would
not recommend using this file until there is some change in code.