really creative concept - though is "fishing a genre"? 😉 I'm joking of course. It works really well!
You know me, I want to see way more bullets, and maybe a little less health. If you were going to make it a full game (you should, I'd pay for it), you need your UI to be a lot cleaner. I didn't actually know I had health until the second play through! Yellow on green is not a good colour combo. Maybe try a big health bar, and tie it to the player's position. I hate UI in corners, nobody ever looks there!
but overall it's a great job. I love your style, man.