Good concept. Lacks a bit of work to make it more fun or engaging, like a score based of how long you survive. Good mechanics on the swimming and I like the use of buttons. Keep it going.
Those are good points. We got a bit bogged down in mechanics and learning Godot for our first game.
I like the score idea, that may have been a more achievable goal for us.
Our original plan was to have the setting change in the background so that it could tell a story and increase engagement.