Found a bug, or at least I think it is, after you confront the harvest princess after meeting the Pumpking it won't let me open the menu when you leave their house, pressing the X and esc key won't bring it up.
Went to the fields to look for clues clicked on everything (nothing) tried to get into the mill or the bumpkin shack but can't. Went back at night and KO'd everything and I still can't start an event or enter the mill/shack.
Right, you're meant to go back to the Harvest Princess' house at night and investigate there, have something to get past the guard if he's not asleep like sleeping powder, he won't let you in.
