The models are good, the water shader is cool, but the game is too generic, you could have added a parallax effect and some particles to the boat and it would look much better, you could have also added other kind of obstacles or maybe power ups, the idea is too simple, when you are participating on a game jam you should thing about something original, use your imagination to create something unique, that's what art is about.
If you keep practicing you'll get better results, and you also ate some cookies so the game is not that bad.