Well, it was pretty beautiful, but the ending was anti-climactic. I expected to at least see the Atlantis rising from beneath the sea. Also, why am I loosing Oxygen while running on the ground? The map is pretty big. I wanted to explore, but had to swim up too often. The whole fight was on the surface. Didn't bother diving.
Oxygen on the surface should not be spent, it was a bug. Since I did it alone and programmed everything from scratch, I did not have time to complete the planned gameplay and plot, because working through each part of the game to such a quality takes a lot of time, this is my mistake, I should have made it easier. I found out about jam the day the topic was announced and was not prepared for it. Therefore, I managed to do only a battle with the boss. This is my second jam so I don't really understand what kind of games to make for jams yet. I learn all my mistakes. Thanks for the feedback.