Thank you for the prompt reply and for actively trying to sort this out for us! I love the game so far and simply want it in the most polished state for all to enjoy.
I just tested the newest (FlashCart) version and it is doing the same thing as the others.
To assist in troubleshooting where I can. On my cart (EZflash) it is recreating the save file on every boot. I can collect the gems and complete a level but it never appears to be actually saving the progress as once I power cycle I can only pick new game again. Or it's simply just overwriting the save on each boot (thus appearing to never save)
Happy to assist where I can.
Cheers