You are the only man who can save the living beings on the island which is about to destroy by natural calamities.

Build the raft and survive the tornado, earthquakes, volcanoes etc
Cut the woods and build the boat for your shelter.
Collect the animals and other people from the way to join you in wood cutting. So collect as much people and animals as you can so that you can save more and more people before the volcano erupts

So build your raft and escape the island