You must have three Shines to unlock Ricco Harbor. After you have three Shines, a new pile of muck will appear on the dock in the west side of town. This mass is pretty much the same as the last one, ...
Before the checkpoint, there are four block platforms that rotate 180 degrees back and forth. When the upper-right one is horizontal at 270 degrees, jump onto it. When it moves upward, jump to the ...