The timing on the animation for the penguin is on point.
The sfx jingle when you reel in the fish is very nostalgic, and the ambient soundtrack is very relaxing.
I think a simple 2-frame animation for the iceberg like you have for the penguin would be a nice addition.
I'm curious what you did to get the background animation/texture for the water. It's very interesting, I think it looks nice.
Some skill expression for the fishing mechanic would be nice to help engage the player a bit