Alright, I can definitely see the makings of something here! I'm glad I got to review this one.
Art: I thought the art and atmosphere looked great, definitely added some tension and urgency to a run. I went into this expecting some sort of a pirate game or open-seas convoy system, but honestly the cramped environment served you well.
Movement: This one was a little tricky for me. I love being tethered to other ships, I think that's a great fit for the event theme, but the jerky controls provided a bit of a challenge. I'm not really sure to what extent the connected boats change the movement mechanics of one another, if at all, but a greater emphasis on that speed decline and added mass would be good to see.
Environment: The art style's great, I think sharks make for a goofy but properly thematic threat. One thing that was a big issue was getting trapped on tiny obstacles. Whether they were buoys or what, I don't know, but the ships at the back of my convoy would hit one that I couldn't even see (due to it being too small or off-screen), and bring the whole chain to a halt. I actually lost my first run because my five ships got caught in a group of these guys, and my hunger slowly drained as I tried to work my way out.
Overall, this was one of more inventive games I've looked at and I totally see the potential for something fun. Nice work!