Hey, I picked up the full game today, and I've been enjoying it, but saving doesn't seem to work. If I quit to the menu and load game, that works, but if I turn off my Game Boy, no save data is found the next time I load. I get the same result when running it with an emulator on my PC, so I'm not sure what's wrong.
What type of cartridge are you using? I tested with EZ Flash, and was able to load my save on GB when using the "backup save" prompt when the cartridge boots. On emulator I had no trouble; it would create the .sav file which would allow me to load properly any time I booted the ROM.
I'm not doubting there could still be an issue, though. Give me more details, and I can look into it. I am also working with someone on the "official" physical release now, and making the sure the save is fully functional in that version is a top priority.