So because the itch app is shit, I'll just make another comment instead of editing the old one.
The game can literally not work from the get-go. Rena does her spiel, nothing happens after. Time doesn't move either, so no clients.
Now, when clients DO come in after you start a whole new game, you brew a potion and put it on the book... and nothing happens. Literally asked for a strength potion, made it, put it on the book... nothing.
This game is simply aggravating with the amount of bugs it has.