Instructions
Dive down to begin exploring. This first spot, called Central, is where you return to later in the game. Sea urchins are scattered throughout the game and change locations each time. Collect four of them and then return to Central.
Swim up and right to reach Gillbarker. Click on the urchins in your inventory and then click on Gillbarker to give them to him. He allows you to go through the door.
Select the floating fun mini-game from the mini-game options. Once you finish one level, Gillbarker gives you a funhouse mirror.
Swim down and left to return to Central. Go up and left until you reach Horst, the tourist. Continue going up until you reach the sunken airplane. Now go right and down to reach Claw, the crab.
Click on the mirror in your inventory and then click on Claw. He will give you his flashlight.