The game says its saved, but when I close and reopen the menu, the file is no longer there.
I've installed though the itch.io client, on Windows.
A light-hearted turn-based JRPG, inspired by classics. Battle through waves of enemies and save the world! · By
Ah, yes, temporary Flash files are being blocked for some reason.
It's possible that you have that allowed, but only up to a certain size - worth checking in that Flashplayer options menu if you can increase the file space allowed.
It's also possible that some other application is interfering, maybe an antivirus, Windows settings, or PC-cleaning utility is blocking all Flash files, in which case it may be tricky to figure out what exactly the problem is. Sorry about that.