Yup, pretty easy

You should extract the archive.rpa completely and then DELETE IT!
So now proceed to the steps below
OR replace your screens.rpy in your game folder with the one i provided in attachment
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First of all you need to have renpy launcher and then open extracuricular activity screen.rpy using script editor that are supported by renpy such as jedit.
After you opened the screen.rpy, press ctrl + f and find screen main_menu():
After this all you need to do is either 1. change True to False and False to True or 2. Replace the imagemap code in false with the imagemap in true.
And now done, just press ctrl + s to save or save manually.
Your game should have gallery now ^^
View attachment 1177156