The art looks okay. The characters bodies are a little skimpy, although I do see you put a lot of detail into the facial expressions. Animations are simple; not a lot of action in terms of what they're doing or the technical aspects of the animation itself. Bending does make it look a little uncanny, so if that was what you were going for, then it works.
But as for your "Everyone will understand it differently" comment, I personally can't understand anything without context. Why are there people on the islands? What's with the dude in the chains? Why the lighthouse? Leaving things open-ended is one thing, but don't expect anyone to come to their own conclusions if they have no idea what's going on in the first place.
The music is nice and low-key, which compliments the gloomy atmosphere of the video you're trying to portray. However, you really should credit them in case someone might like the song and want to look it up on their own time.