Oooh! These are great ideas!! Yeah we havent quite decided fully on progression yet. The idea is to have a calendar as an overworld. Every Monday, Wednesday, and Friday (boss round) you play your coupons in the store. So far for Tuesdays, Thursdays, Saturdays, and Sundays we have only really thought about various mini games and events, but these would be great places to actually slot some more interesting story elements / different gameplay too!
Thank you for the suggestions! You got me definitely thinking on this some more! Haha. :)