Excellent
This was a superb game, just a trifle confusing/annoying at times. To alleviate people from banging their heads in on a few parts, I'm writing a quick walkthrough here.
If you want a full walkthrough, read below. If you just want short answers to some of the harder points (where to dig, for example) scroll down below the walkthrough. However I strongly reccomend doing this game without, as you'll finish it in 8 minutes with this walkthrough, rather than 2 hours.
WALKTHROUGH! SPOILERS! DON'T READ IF YOU DON'T WANT TO!!!!
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1) Start on the Hotel Island. Go into the hotel and recieve your umbrella.
2) Go to the top right and get in the boat by talking to the tourguide on the dock.
3) Walk straight ahead until you see a cutscene.
4) Walk into the new hole that formed, then walk to the other end.
5) Go straight ahead until you see an idol. Walk into the thing laying on the ground and watch the cutscene.
6) Walk down until you see a guy standing in front of a house. Talk to him, then click the umbrella to give it to him.
7) Walk slighty to the the right and talk to the girl in front of the colored scales. Choose the green scale, second from the right.
8) Go into the hut the guy used to be standing in front of, and click on the feathered hat in the top left.
9) Go up-left towards the dock, talk to the guy standing there, and tell him your are a chief using your feathered hat (click on it during conversation).
10) Click on the boat to go back to Idol island, then click on the idol and use your mysterious stone disc on it.
11) Go to your left and stand in front of the giant shell, then while it is selected by your camera press the red button to take a picture of it.
12) Walk back to Treasure island by going through the hole, and once there click on the treasure chest to the right, near the reindeer.
13) Use your green scale on the chest to open it, then take the watch.
14) Go back to Hotel island, and talk to the Competition Host to the left. While talking, press the play button on your camera and show him the shell picture.
15) While talking to the hotel owner after winning (the guy with the hat) take a picture of him by pressing the red camera button.
16) Go into the hotel to the gift shop, and use your voucher while talking to the clerk. Now select one of the maps.
17) Leave the gift shop and go into room one. Talk to the bear there and offer him your watch in exchange for another disc.
18) Leave the hotel, then go to the bottom of Hotel island and talk to the seal to get his shovel.
19) Sail to treasure island, then walk left into the big sandy area. Keep moving around and clicking the shovel until you dig up another disc.
20) Head through the hole into Idol island, and put both discs in.
21) Use the rowboat to get to Islander island, then go talk to the chief.
22) Show the chief the picture of the hotel owner (his son), to recieve the last stone.
23) Head back to Idol island and replace the stone to win, and enjoy the amusing final cutscene.
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SPECIFIC DIFFICULT PART SOLUTIONS:
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– You can get the seal's shovel after you have messed up the weather by disturbing the stone.
– You win the shell contest by taking a picture, there is no way to actually carry the giant shell back.
– To get off Islander island, you need to give an umbrella to the islander standing in front of a house, then get the hat inside the house, then use it on the guy guarding the boat.
– To open the treasure chest, take the green scale from the islander girl.
– To dig up the last symbol, head to the second island (Treasure island) and to the sandbar on the left, then click the shovel. You must also have the map. (if you look at the map, two sandbars and the hole are matched on it)
– To make the chief happy, you need to bring him a picture of his son (the hotel owner), which you can do after winning the shell contest.
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Hope that helps everyone. :-)