with the new update the dev did mention something about making a separate save file just in case of something, ill just post what google translate said though:
"
It will be version 0.50.
In this version,
・Stage EX7 (the bottom of the well is changed to Sunano Underground Ruins)
(but the boss is not yet)
will be implemented.
It is in the form of exploring the dungeon by having the four mural goddesses eat it.
Moreover, just like a normal map, it moves through their bodies.
Esophagus, stomach, duodenum, small intestine, large intestine, rectum. Let's do our best without being digested.
The search will continue even after you have been taken out.
By the way, from this time there will be something called "Despair Execution".
If you do this, the progress of the game will be hindered, so
when you are warned whether to save or not, simply save to a different location.
Also, if you don't aim for it, you won't be executed in despair, so I don't think you need to worry about it in normal play.
I wanted to go all the way to the boss, but
when I finished the stage I was making until last month, it was boring, so I scrapped it all
and remade the dungeon.
It took some time, but thanks to that, we were able to create an innovative existence called the Mural Goddesses, so it's all right.
We are aiming for the final stage implementation this year, but will we be able to make it in time?
The final stage event, boss graphics, etc. are also progressing in parallel, but there is a possibility that
they will be canceled again.
Anyway, I hope you will be patient with me.
If you find any bugs or oddities, it would be greatly appreciated if you could let us know.
Once the small window appears, you can simply press Ctrl+C to copy the contents. This will make identifying the bug much easier. Please put them together if possible.
Of course, it doesn't matter if you don't.
Feel free to help yourself."