Currently in the demo there's only one hidden use for spending 200 of them, which is grants a reward that also has no value. In the future, bits will be a general currency for hints, minigames, and some misc interactions.
Maybe other spells too ?
Lots of upcoming things 😉 The demo's pretty bare-bones compared to what I'm building towards. But the demo will eventually have more spells as well, across the next few updates.