dunno if it would help but you can add a download link a megafile(or whatever its called) to the newest update and just update the changelog, like i said idk if that would help, sorry ^^"love the game so far tho!
the problem is figuring out how to make a paywall that resets every month
Maybe a password thats posted on Patreon/Subscribestar every month?, I know that you can create password locked Mega files
