hidden underwater levels
complete the game 3 times with all shines, go to the airport and buy a scuba diving nozle, use it, edit it and choose where pipes to go to places are, and then create the places they go to.
go to the shop, buy ten shines, look to the side and see a m, go in the m, and use blue coins to pass levels you're stuck on.
complete the game 3 times with all the shines, go to the airport, put on the scuaba diving nozle, go underwater, go in a pipe under the amusment park, go on the farist wheel, use your nozle and spray the giant n00b in tell he dies to get 10000 blue coins.
on the boat
in the middle of the island go on a boat, you'll see a smaller boat right when you get out of under the arch, go on the smaller boat, it will go under the water to underground, finish the maze to get the shine.
(notes: scuoaba diving suit lets you go anywhere underwater and you're only aloud to put pipes where you can't go without the scuaba diving suit)