Save and Load .bat game

You could also save/load with only values, like

(
  echo %highscore%
  echo %playername%
  echo %points%
) > savegame.sav

and load them with

< savegame.sav (
  set /p highscore=
  set /p playername=
  set /p points=
)

The first part simply redirects the echo outputs to a file.
The loading part using also file redirection, but in this case as input source.
set /p commands in a block can read consecutively lines from the file.

Try something like this:

@echo @ECHO OFF           > savegame.cmd
@echo SET ITEMS=%ITEMS%   >> savegame.cmd
@echo SET HEALTH=%HEALTH% >> savegame.cmd
@echo SET MONEY=%MONEY%   >> savegame.cmd

will "save" those three variables in savegame.cmd. Then you can call that file to reload the variables.

(Doing it with a for /f is quite a bit trickier.)