I really like this idea a lot! I was able to catch all the fish in the world haha. The intro was really awesome and I thought the art was well done. I was really confused by the one-way walls at first. It wasn't clear to me how to tell which way they went at first. I also think collision with hazards could be a little more forgiving. The solution to level 6 was really surprising... I'm not really sure how I feel about it. It's awesome you can do that with the mechanic, but it was never formally introduced so it's not obvious. I kind of stumbled into figuring it out just through experimentation. I'd love to see this idea iterated on, it's really cool. Great job!