Thanks for being open about the AI usage and how it was used. I personally have no issues about AI being used for art in jam games - unless it is not disclosed. Then you are always just left questioning what is actually AI and what is not.
The generated art in this game is fine but it lacks cohesion. Color-palette, pixel sizes, and resolution are a bit all over the place. But that is to be expected with AI art, and I feel people are slowly getting better using AI for art in more cohesive ways.
The highlight mechanic of this game is definitely the jumping. It just feels fun - just like I imagine dolphins feeling when they do that in real life.
Aside from that, the game is quite basic and there is not much motivating the player to play it for longer. It does not really change the longer you go and it is very easy to get good distances just by swimming near the surface. I also got stuck on top of boats a couple of times which was a bit annoying.
But overall, thanks for a solid entry and bonus points for disclosing the AI usage.