It's a really nice and relaxing experience - Just the sounds of the waves, the creaking ship, and the bell after a catch. The graphics also lend to this feeling of pleasant simplicity.
The gameplay is easy to catch onto after a few clicks. I like that the timer starts only when the first catch has occurred as it gives you the chance to make that first haul count by waiting for a large cluster of fish.
I like that the boat's position is slightly affected by the waves. A potential chance to add variance could be to have the amount of ocean that is visible be affected by vastly higher and lower waves. Another potential improvement is to have a basic scoring system and have the fish be worth different amounts based on size.
A peaceful fishing game.