the ceiling on the royal chamber and some of the walls allow you to swim outside of the building, i was able to swim out from parts of the top and some of the right side of the royal chamber and into the side of the library, which might let people skip from place to place ! freaking amazing insane game btw?! 
12 days ago(+1)
im guessing theres something going on with collisions after you unlock certain areas, because after being stuck on two of the shells, i went back outside to the beginning area of the game and swum around to see if i had missed anything, i found myself in a new area that turned out to be the top of the tower, I didn't know that so I swum down and read the letters in reverse order lols, here's lani in the tower with the door still locked, i was able to swim in from the top because I thought the top of the tower was the elusive "pink kaska". I then swum back up, and read the letters again in the correct order, and then the end game screen played, so i did still get to see the ending :D im just curious as to what that final spell was... 