This is pretty solid! The piano and harp play nicely with each other and the chord progression is nice and somber, perfect for the isolated vibes in the painting. The vibes are great and it creates a strong setting. I do agree with EinelTheFox here in that the next thing I would personally look at would be giving it some more movement and telling more of a story, whether that be through adding instruments, a more drastic change in chord progression, or whatever else. This doesn't take away at all from what's there though, because it's very good!