Very tense atmosphere, well done!
It took me a while to figure out that what I was doing (polishing, fueling) had any effect. Adding some visual in-world feedback to player action would improve this a lot. I also found some font hard to read.
I didnt quite understand why some ships still crashed even though my light was on. It seemed a little inconsistent, and a bit like my actions didn't matter the way I expected them to.
Anyway, overall very well done. I also really liked the theme/setting of being a lonely lighthouse keeper.