A very good looking game! I love the way your boat and all the particles in the water, I feel the omph behind my move!
However, I will make some suggestion.
1/ There are no tension in the game. The objective is to not fall into the hole, but you can't fall into it if you just pass through the rings. Add some stakes, some mechanic that make the fight harder.
Overall, a very interesting experience. 6.5/10