I like this one a lot. It takes time to get a feel for the controls, but they make the gameplay more interesting. The visuals are also unique and cool. I had to stop for a moment and appreciate the jellyfish.
I dig the minimalist storytelling - the reveal of the boss was unexpected and very cool (although I may have had a bug - he just sorta froze after his big reveal). The ending overall was a great touch.
The main criticism I have is with the enemies. It seems sort of inconsistent about whether I'm doing damage. Most of the fish don't seem to move on their own. I'm also not sure how you're supposed to attack the pufferfish types without taking damage, although that may be a skill issue.