Hello!
I think the beta/prototype version exist! I found some strange things about the Famicom demo.
1) The first boss is different, different dungeon layout, different blocks, the boss have wings, it's feet flashes, and have green horn. I have the picture.
(beta)
(final)
2) I don't remember Gleeok gives you bombs, the bomb looks silvery than blue?
3) I don't know how you get magic wand with low hearts and most of all, where the hell are the bombs on the status screen? The map layout for Level 3 is different???
Enjoy! oh on the screenshot I hacked to get Lion Key to get to the boss quicker