After playing 3–4 games, it’s fine for me, but if we don’t link all the rules of the game on the itch page, new players won’t understand how to play.
I would say there’s also a missing button to show the tutorial at the beginning of the game — even if it’s just text.
Finally, I feel like the boats don’t give enough feedback: it’s hard to understand in which direction they are going, or whether they have actually seen the rock.