Slime Climb
Under the sail that the end target sits on. Use the "!"
barrel that's off to the left, to survive jumping into the water
and swimming to it.
Pick up the Kannonball that's not far from the end of the level,
carry it to the left to the Kannon.
There's a Klump just past the continue barrel, at extreme right-hand
edge of the level. Kill Klump and activate the "!" (invincibility)
barrel that was under him. Jump into the water off the left-hand
edge of the sail that Klump was standing on, swim downwards and
to the right, following the trail of bananas.