Well for one thing, that's a really strange directory structure. The Z drive is referring to a WINE prefix, so I'd go into the prefix directory and determine the correct path that it should be pointing to, and then find out what its calling that incorrect path and fix it.
I just looked at the script you posted, can you try running echo $GAMEDIR in a terminal and see what it's defined as in your environment variables? If that's the cause of that odd path, then you can update it by running export GAMEDIR=/home/$USER/new/path/to/game