Couple notes of feedback:
Should make the dash add a force rather than control my movement, so that I can swing sideways if I wanted, gives me finer control over the movement, would be really fun.
Also, I feel the dash should go further if I'm a higher level fish. That feels intuitive. It currently feels like the dash is slower when I grow, because I'm bigger and the camera zooms out.
Otherwise, just more content. This was really really fun to play!