Nice game! I liked the tutorial, you could instantly jump into playing the game. There's nothing I hate more than having to read the instructions after you've started the game, and you handled this very well.
I like the music! It sounds very ocean-like. I also like the visual indicators of the strength of whirlpools!
My only thing is the whirlpools need a nerf-- once you've hit one it's game over completely. I think if they were slightly less powerful, they'd still be dangerous but it would just have to require fast reactions.
Good work! :)