Neat little game. With a little bit of tweaking of the values, I can see it making into a full minigame, with the EXP system and all. I did find the sharks more worth it to kill, since the fishes all swim away too quickly and it’s too dangerous to go after them. Also the game could kill all fishes when you level up so you can choose your bonus, I ended up losing all my healths because of that.
Neatly polished, and it was nice to see the neat little tutorial you made as well.