Probably a bug: When I go to a shop and reload the page then load the run, the items in the shop change. Theoretically, someone could keep reloading the shop (for free) until they find something that they want, although it's pretty tedious.
currently its not a bug, it just doesnt save every little bit of info regarding events/shops/battle layouts. You could definitely exploit it, but it doesnt let you do anything more than just being lucky so for now im not too worried about it.
