I love that this is 2 player!
The Sfz background was too repetitive, sounded like white noise too much, would have liked it at a lower volumn compared to the rest. The clunking metal steps were great but again a bit loud would have liked them mixed a bit lower and maybe a few more varieties of sound.
Cool concept, I think you could have maybe done the map a bit more zoomed in I think with a bit more detail on the walls. I found myself leaning in to see.
Also the movement of the player character didn't seem to respond as I expected, facing the right direction to swipe was a bit annoying at times as it got more stressful.
Would be nice to be able to attack the monsters also some variety in the things 'attacking' the ship if you fleash this out.
Overall though good job!