I tested it here (on an emulator) and it did work so I'm not sure whats wrong :( I don't currently have my flashcard with me for testing but I'll take a look, maybe it's something gbstudio-related.. sorry about that!
No problem! Could also still be hardware related, my flashcard is new but I have had some occasional glitching/crashing with other games. Possibly I already scratched the microSD, or the cartridge loosened just enough from the console to mess it up, or there was some dust in there, no idea. The only thing that's strange about this glitch is that the menu will come up like normal but when I choose "load save" I get the white screen again, as if that's where it last saved. So I do have to start over but I don't mind all too much because I was enjoying the atmosphere and everything. It's a really well done game! A weird one time fluke of a glitch doesn't detract from that. :)