This was a lot of fun! The lack of a tutorial and extra clarity on things made it a lot harder to understand how things worked for a while (especially when you weren't underwater), but eventually things made sense and I got to the credits! I love the pixel art everyone, the visuals are fantastic! Music is great and I like the adaptive change as you go deeper and deeper and change between the dock and kitchen area. Mechanics are solid but it again the lack of the tutorial made it a little hard to piece things together for some time.
The only complaints I have are a few areas that could use some polishing. The core gameplay is solid, but the lack of polish in some areas does muddle it a little bit. The music for the kitchen and dock seem to overlap when you are in the kitchen area, so the music kinda turns to white noise at some times and is quite loud, leading to the music being a little grating there. A lot of sprites do have collisions but there are certain areas where they are layered a bit awkwardly, so the player clips on top of so many sprites in the overworld, like the trees or the tables or the crab pinchers. Again no tutorial means no direction on how anything really works, you kinda just have to keep experimenting to see how things work, which was fine but I can see how people could easily get stuck without any help in some cases. For instance, the 'tab' key not being listed to view the recipes means people could never figure out how the mix foods together without random experimentation, and it would definitely take a while for people to figure out that the plates are needed to combine the ingredients together. Also with the table to hold plates and ingredients, having six spots made it a little hard to make sure that I was interacting with the right spot on the table sometimes, but it wasn't too bad to deal with. Not having a description on the upgrades was a little confusing at first as well, I figured out what they meant eventually but some label/text to give a clear idea of what each does would be nice. This is extremely nitpicky but a small visual polish if you wanted with the harpoon could be to have the spawn of the harpoon shot coming from the gun's barrel instead of the center of the player as well, though that could mess with the green fish that rush towards you.
I apologize for such a long comment, great work from everyone on this game! My comments above are extremely nitpicky, I really enjoyed this game as a whole!