To be honest I really didn't like it. Its a good concept but it seems to be lacking something. Mostly its just that instead of looking like the whales actually interacting with something, he just kind of swims in front of it and half a second later the object is affected. Also its incredibly aggravating to chase around fish when you move at the same speed as them. And you boost towards the surface and get no air? It just feels immobile and kind of lame.
Personally I'm sick of these artsy little games. Everyone convinces themselves that they love it because its so "thought provoking" and "original". Isn't it just a graphically inept, confusing little pixel game with no clear story line? You might as well just sit someone down with a piece of paper, tell them it's art, and wait for them to make up a reason why the piece of paper is amazing.