Hi! Devs here, there's a bug with the furthest house quest on the hill, up the many steps- completing it won't remove your bouquet which will make you stuck if you do that house last- BUT you can get around this by NOT doing that house last- then you'll be left with a bouquet you can just deliver to another house.
Unfortunately this also means you won't be able to finish all the quests and get the slice of cake waiting for you at the end as thanks for the flowers- so here it is! Thank you for playing! *Edit- originally thought to be progression blocking, but turns out you can get around it and reach the end! Have some cake anyway!
