From getting off the boat from Dr. Jakar's island, climb up on the dock, walk forward until you get to the wood platform.
Here you find the bucket you rode down to get here. Ride back up.
Get off the bucket and go a lil to the left to access-walk the tunnel. Walk forward until you get out of the cave inside this giant tree and out into the sunshine.
Take the main path to go back to the elevator tree at the end of this path.
Ride the main elevator to go down and now you will be at the flute area (used to call this elevator you are in on).
Move a little until you see the flybot at top right of screen. Ride the flybot to spaceport.