First off, the pixel art was really impressive, I appreciate the smear frames in the animations! And it was super cool how the whole layout of the boat was functional and still boat shaped, I know that's not a super easy thing to do!
However I did run into some pain points, so here's me trying to give you constructive pointers:
There's not really a reason to use that many decimals for the countdown, you could truncate the significant digits and make it a lot cleaner. It's a SUPER minor issue but it kind of indicates a general lack of polish for the game, if that makes sense.
The mouth sound effects were a bit muddy for gameplay, the fact that they were all mouth sounds made it hard to distinguish different audio cues.
The fishing poles were really buggy on my end and crashed my game a bunch.
A cinemachine camera would have made the camera tracking a lot smoother and more professional looking, and its not that hard to implement. Maybe an idea for your next game!
But unfortunately, my biggest issue was that I didn't find much of the gameplay to be engaging. The whole reason you're powering the ship and maintaining your sanity is to keep playing, but at no point does the gameplay turn into something truly innovative. You're just... not losing, and that's not inherently fun in my opinion.
BUT like most things, it was a lot more fun in multiplayer. I mean, the fact that you had FOUR PLAYER MULTIPLAYER is crazy in a jam game, that's so fun! I don't have a numpad but I do think that the way you supported four different control schemes was really smart, and the menu to select players was really nice too.