It was an absolute delight to play, the sense of danger is awesome and the goal that you can always see in the distance is very enticing. Easily the best game I played so far from all the submissions for sure!
That said, I had 2 small problems with the game - and I do hope you'll take some time to finish it up - that might hamper someone's enjoyment:
1. The player character sticks to walls, doesn't slide, which made navigation in the dark very hard (until I figure out that there is a flashlight - other buttons are on the screen, that one isnt). I also once went into a wall next to the throttle lever and packined a bit, because I was going into a mine. In general - nothing major, just some QoL stuff.
2. The ending wasn't really satisfying. I'm not sure what I was expecting tbh, but I really wanted something to be there other than a screen of text all of a sudden. I think a docking sequence and maybe getting out of the boat to do or see something (something very simple, like a grave of a loved one up next to the lighthouse and then fade to black and credits would work beautifully!). And also the mine screen text was a bit anti-climactic, all it needs is like a "click" and then sudden black screen with a muffled explosions sound.
And if you don't feel like doing it, let's talk, I'd love to finish it up or make my own version, it's such a cool concept!