Unfortunatley, you can only do each island once. To do it again, make another character. There is no limit on how many characters you can have.
you cant
Use a different User Name. Each user name can only play an island (or part of an island) once.
You can replay an island by going on the small island map (upper right) and pressing the "restart island" button on the bottom left corner. A player (same username) cannot earn more credits for an island once it has been beaten.
Spy Island? Define Question more throughly!!
go to B.A.D. Headquaters.
The "funny glasses" that were on Super Power island were a promotion, but they were moved to the Eyewear store on Spy island once that island was opened. Similarly, the spy sunglasses from Spy Island originally appeared as a special item on Time Tangled Island.
Spy Island is island #6. After Spy Island is Nabooti Island #7
The special "spy chic" sunglasses were once a special item on Time Tangled Island as a promotion for Spy Island. They are no longer in the designated location there. All of the Headquarters agents on Spy Island are wearing them. (see related question)
go to the teleporter and fix it
There are vaults on more than one island. Some are:Spy Island - enter through the ceiling and click the spy to untie himSuper Power Island - you chase the Copycat clones downstairs and upstairs, including one that is on a light just above the vault door
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Spy Island is out alredy. Spy Island is out alredy.