Fallen Star Island

Fallen Star Island is the thirteenth island in altitude and the final one where you can receive gems, as Rank Up Island does not provide any.

To get said gems, the player must collect 10 fallen stars by pressing the large red button in the center of the island.

It is a fairly simple task, all you need to do is walk towards a collection of stars (which will randomly spawn) near you and collect the stars by touching them.