I love the art style.
The game could use a balance pass. Some of the fish are just too fast to possibly react to.
Haha, yeah, I've been there. With one of my Ludum Dare games I was feeling that it was way too easy, so I made some quick changes at the last minute to up the difficulty a bit but ran out of time for proper testing. I accidentally made it way too difficult, to the point where some players were getting frustrated and just having no fun. It really hurt my ratings, unfortunately.