The art is really cool! I think you have an interesting idea with the light as a bait (just like the real fish), I just wish you went further with the idea and really be able to use the light as a bait and not just a way to move around.
Also, I think this kind of game works great when there's a feeling of progression, so instead of having a level that goes up, maybe using the size of the fish would make the progress more satisfying. Or find some new mechanic! Keep looking!