What to do when you get to deep jungle in the kingdom heart 1 game

There's alot of running around involved. Pretty much just keep visiting every area, from the cliffs to back at the tree house, until you've found Donald and goofy again and saved all the gorillas from heartless, and one other thing (no spoilers here). eventually theres a boss fight and a new area opens up past the cliffs. If you don't know how to get to the tree house, you have to climb the vines in the hippo's lagoon and swing on the vines, then swing on more vines, then climb more vines, then go to the tree house.