This is very unique!
To pass level 1 i had to read a lot of text (itch.io game page and in-game help menu) since i didn’t understand what all these souls and sanctuaries actually meant. However, once i got it and passed level 1, it started flowing and it felt a lot more fun!
So if you work on it after the jam, i’d suggest to focus on that. Make it flow. Let the player easily pass level 1 while also learning the basics, then introduce something new with each level until you get to the full game. This effectively removes the need of having to read a wall of text just to know what is happening, because it is now intuitive!
Sorry for spam, i think itch.io glitched on me and i pressed “post comment” multiple times.