I've already commented on the page but here's some more feedback:

I love the mix of 2D and 3D in here, even if it's somewhat mismatched. It mirrors how the story is a weird take at a children's tale.

One thing I noticed is that there was a vortex at the beginning that doesn't get used anywhere else in the game. I felt like it was missed opportunity. Perhaps it would be nice for the big enemy fishes to spawn them as temporary obstacles.