Thanks a lot for playing and the detailed feedback!
1. There is a reset button in History, it's definitely out of the way and hard to find though, I'll think about making it clearer
2, 7. Will do
3, 5. I plan to tie inventory expansion in to divine boons as well, this will be updated with caves content likely. It's tedious indeed right now, you'll be able to get more crystals in caves and keep playing more naturally.
4, 6, 8. I plan to add new layers of actions to existing areas via the castle's special mechanic, completing which will add more points for extra activations.
9. I didn't have much lore for the horse in mind, but now I'll think about it more haha. It is after all the only other "character" so far.
10. If all goes well there should be, and a paid steam version when it's closer to completion, leaving a free demo on itch.