Thank you for the feedback!
With regard to the theme, in our game, "The void" is referring to the monster that the cult worships. It's a Monster from the void (a fictional place sometimes used in films, books, etc; there's even a movie with the same name as the theme of the jam). You must do the ritual (more like a dance in our game lol, we wanted to make it a bit funny) to summon the monster so it can grant you a wish (if you do it right). We didn't have time to include a tutorial/introduction of some sort, although the story could maybe be explained a little bit better...
We'll have to rework some things if we ever update this game 🤔