Six map rooms. One old captain's hoard.
Every visit to the wishing well grants a wish and opens the next room on the map: the waterslide rush, the bone organ that plays notes you have to hit, the lighthouse beam pointing at your next shot, a cave-in, a rockslide, a corridor of booby traps.
Knock down the organ's four notes and the secret passage opens; lock three balls behind it for Galleon Multiball. Clear all six rooms and the old captain's hoard opens up: four balls at once.