Was a very fun little game. Didn't get to the proper end in the video but absolutely loved the environment and ambience of the game. Think you nailed the dark aspects and also the grittiness of 'waking up and finding something's gone wrong.'
The darkness felt thick and like something might be on the other side and also the stuff in the environment has a very real and dark feel to them; hence amping up the spookiness of the game.
Not sure if it was a coincident but the way the blood started coming from the pipes after the player blinked was a very cool thing and would love to get to see that used more if you do update this in the future.
The ship tilting to one side was also a good touch and made it feel more scary and realistic as well as the moving flood of blood.
Overall, a great game and a good play!