The art, ambiance, and narrative are really well done—congratulations!
Unfortunately, the tutorial disappeared too quickly for me to fully understand everything (controls and projectiles underwater/on the surface). I had to restart (including the cutscenes) to properly take it all in.
I also wasn’t sure about the advantage of moving forward instead of just staying back—does it have a purpose?
In any case, great job! The interpretation of the theme works really well, and the overall artistic direction is fantastic!