A short found artifact mystery in a mermaid palace · By
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?! 
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... 
Great game so far! I think I ran into a bug that I cannot get out of without resetting. I unlocked the Library, unlocked some Kaska's, and was trying to find a way to open either the Chambers or the Gardens. As I was review the notes left around the areas, I noticed you can go through the walls once you have that area unlocked. So I started using that as a way to quickly review the game notes with my notes.... and then Lani got stuck between what I think is a wall between the entrance way and the library. i was approaching from the entrance corridor to go up to the library, and accidentally de accelerated in the wall, which i think got me stuck. The fish cursor is dark grey through every angle and range I could apply, and Lani will not move. Since I am still near the beginning i can just reset to to get to this point again, but wanted to leave a post in hopes it can be fix so no one else has to reset. here is what it looks like:
As I just restarted the game to try to retrace my steps to help fix the bug, I noticed i cannot go between rooms anymore. I assume now the real bug is being able to go through the walls, and then I got eventually stuck. I tried to get Lani in that state again to be able to go outside of the wall boundaries, but I have not be able to replicate it. I will keep trying/playing and report back if I see it again!
Thank you for the resetting command! Unfortunately after I tried to retrace my steps (without saving) , I tried to refresh the webpage to access the menu to get back to my other save, but it was gone. By this I mean that the continue button was greyed out, and I could only start a new game. This is not a big deal for me currently, as I had only solved only a few puzzles beforehand, but i wasn't sure if that was intentional.
I was able to swim through the walls and around the locked bedroom chamber area before it was revealed, and using the passwords on the starfish and seahorse still revealed the notes. The sprites for the notes were invisible, but the magnifying glass cursor still appeared over them and let me read them.
thanks for reporting this! Yes, there is a known issue about walls just...deciding not to work. I haven't been able to replicate it, it may have something to do with the collision loading in after the game starts or something. Also, There is a way for me to get rid of the starting game screenshot, which I have done so there's no more confusion at the start haha!
