I’m trying to get to section 55 and it’s still locked, I bought almost every plan. What do I do?

The challenge of the game is to advance the story while decorating the island. To advance the story, you need to continually add Flower value to your island. Flowers can be obtained by renovating landmarks, upgrading 3x3 and 4x4 buildings, and by purchasing decoration items. If you buy items, the construction must be complete and their ribbon removed to have their Flower value count. The upper right corner shows you how many more Flowers you need to reach the next level.