The water section was added fairly late in the development of the game, so I was probably a little fatigued, and given its size (22 rooms, each 7x7 tiles in size, but collision behaves poorly if bordering tiles don't match ground with ground and air/water with air/water, so really I've got a 6x6 area to work with) I simply didn't bother with adding generic landmarks that'd just make it harder to get through the solution, which ended up making it kind of impossible to map the area out in your head and build a sense of what's going on and how to navigate it. Sorry about all that.
The music is actually not composed by me- it was something copyright-free I found in the jam raft discord's resources channel (by the name of "8Bit Cave Loop", by "Wolfgang_"). I'm glad I didn't have to make any crummy programmer-music for the game, otherwise I would've been doomed (the sound effects, which are by me, certainly aren't groundbreaking)