bottom left half of the bottom right circle.
give the cracker to the bird; get the feather.
use the valve on that thing with the pressure gauge on the left island; get the fly.
use the flat rock, the leaves, the branch, and the fire stones to assemble yourself a torch.
put the dry leaves on the flat rock on the left island. put the branch on top, then use the fire stones to light the leaves. pick up the now-lit branch.
use the crowbar to open the barrel; get the corkscrew.
use the corkscrew to open the empty bottle.
use the feather to unlock flying world.
click the penguin to see what it wants.
something about the key 