Wait... So what do I do?
I know that making more followers makes more souls, and I use souls to make followers...
But why? And what do I do aside from that?
Still working those bits out - the jam is still in progress! Bear in mind the jam is to make 'clicker' games; "video games whose gameplay consists of the player performing simple actions (such as clicking on the screen) repeatedly to gain currency" [Wikipedia].
The core idea is simply to use this mechanic to explore a map on-screen. Aside from creating followers you can also spawn monoliths to draw your followers to new locations. The world is infinite, and tonight's update will bring in some new structures your followers can discover.
I will admit the game lacks direction - but it was conceived as I went along, mostly as an excuse to use technologies (flow fields, entity-component systems, infinite terrain) that I wanted to use but hadn't had a chance to before.