I've gone through the first few dungeons of the Sea Tower, confronted Winski, and retrieved the Sea Tower Key. However, the locked shack (which I'm assuming the key opens) doesn't respond to the key - I just keep getting a "LOCKED" message. Any idea how I can bypass this?
Also, the Sea Dragon mentioned extra dungeons. I'm assuming they're within the locked shack, but am I missing something? There don't seem to be any exits to such dungeons in the underground.