A great game.
I really got into swimming around and finding the pieces.
There was an issue when picking up the scroll in the Captain's Cabin. I had collected a few pieces when I return there. If you then pick up the scroll it says 'Press B to collect' (like the other items) but it doesn't disappear when you do it. It then appears each time you press B when trying to collect further items.
Plus I fell through the ship a few times after climbing back aboard.