How do you get off the island?

Endings:
After you get through the ruins, you have to get through the bandit camp. There's more info on that on the Hints page. As for the actual endings, there are several dying ones if you forget the proper items (ex the flare gun on the raft), so I'll list them. Crates-Warehouse Key from Foreman
Boat-Map from Boss's office and Boat Keys from General
Raft-Flare Gun by Lockers(notcie boat and tell Skye first)
Radio-Boss's office
I also heard somewhere that if you stay for 365 days (year) you and Skye end up living there forever. Personally, I think that kinda defeats the whole point of the game. If I mixed up any items, I'm sorry, but they should be listed with their carriers on the paper on the lockers. As for Skye, she needs bottles filled with water to feed them. I suggest putting them in her inventory and on the shelf and putting water in the barrel. It doesn't always work, but that's because the computer exists to make your gameplay more difficult.

Sorry I forgot you need fuel for the boat too.

The chicken and the goat dyes no matter what. I don't know how to get the egg from the chicken, but I do know a place that give you feathers and eggs x]. Go to the grass lands and go around the edge until you find a little exit. It looks like a dyed end. Go to the top left corner and your will see some rocks. Save in case you can figure out the way out. Anyway. Go around the edge again until you find a place to climb down. When you see a log, push it. It leads to the second beach where the life raft it, but don't go that way yet. To the left there will be a bunch of "stairs" climb them. You will see some trees, some will have feathers and some will have eggs. Then go back to where you pushed the log. Go home from there. It helps to have the map opened while doing this.

If you want milk from the goat, get a bottle. Next time you eat give it to her when you are giving her food. Soon you will see the bottle will be filled with milk.
HOPE THIS HELPED!