It would be neat if there were an area in the game where the whole land was made of sweets and you mined for chocolate chunks and peppermint chunks, etc. and then used those ingredients to make candy and pastries.
On the World Map, there are a group of islands by Ix. Candyland could be an island byside Ix.
I also thought there could be mines under the islands that are all inter-connected. Go into the mines from one island and come out on a completely different island.