Hi, I'm Acuristic, and here's some feedback:

Things I Liked:

• Humor: I like the fact that you used the name "Fih" instead of "Fish" and the turtle (turtlerial) also asks you to shut up and stop asking stupid questions. It makes me feel more engaged in the game. Good Job!
• Sound Design: Almost everything you do has an audio feedback, you nailed the sound design, adding "click" sound Fx for when you scroll/switch attacks would be a nice, along other such small addition.
• Boss Concept: I really like the boss of the game, it's a unique concept of a huge fish with a cat's face attached
• Art: The art is quite simple and minimalist, and perfectly  suits the sounds in the game. But the ocean (BG) lacks depth, one way to fix this is to add a subtly light to the player, and optionally to the humans also, and a global light at the top edge of of the camera. This will make the ocean's deeper areas (areas which are further from the light source) get darker and the shallow areas (areas which are closer to the light) lighter. You can also add a sky and a beach Bg in the upper area of the map instead of just the ocean everywhere.
• Polish: The game is surprisingly polished with the dash fx, the human damage particles and the shock particles. This makes the game feel "completed" instead of unfinished and prototype-ish.

Things that can be Improved:

• Start Sequence: The actual start button appears after quite a few clicks on the fake start button, and it also gets repetitive after a while so, you can try reducing the no. of clicks it takes for the actual start button to appear. Same with the day counter, it is quite slow you can fix this by decreasing the time it takes for the counter to disappear.
• Attack: There are 2 systems limiting the attack, the stamina system and the attack cooldown it seems a bit too strict, I recommend to keep one and remove the other, if you decide to keep both then, you should also reduce the cooldown on the first 2 attacks. The reach/range of the attack is too little to, you can fix this my giving a bit more acceleration to the player in the direction of the attack as the existing boost is too little and requires the player to be really close to the humans to attack.

• Boss Fight: Although the game is polished and is fun, the boss fight itself felt a bit chaotic, this is probably due to the slow speed of the player and the small reach/range of the player's attacks and the fact that there are multiple targets to attack.
• Borders: The humans can go through the borders, but the player cannot, this means I have to wait for them to shoot the line thingy and then move away, pulling them back into the border, it breaks the immersion and also reduces the quality of the game.