Played for a bit. Gameplay wise it could be fun with more variety. It's simplistic, so not much to say. A few observations, perhaps for something your make in the future.
- Not sure why health and score are in the background and hidden by trees.
- The fishes can come too close together, which doesn't allow to kill the second fish because vigor doesn't regenerate quickly enough. This may seem unfair to players as it's unavoidable no matter the skill.
- Add an option to turn off the music
- Maybe provide additional visual feedback when losing a life other than a sound (cam shake).