@Cherno: Hi Cherno and thank you for your help. I tried to extract with Deluxe Gfx Ripper but with no great success.
So I use currently ScreenGet but I'm not sure sure I've got all the sprites. An example of level 2 enemies:
Here is a savestate if you can don anything with it, I'll be grateful
:
https://drive.google.com/open?id=1bd...y14U31-c7AfydO
@Valken: A Moonstone project has already been made by bWWd:
[ Show youtube player ]
The link of the demo:
https://vk.com/doc5795490_466560337?...768df190d29c8c
There is some interessing thing with DAIN, we can make sprite interpolation and the result is like this: