I like the tone and visuals, very gloomy and ambiguous. You've set the stage well for a story, I feel more along the lines of horror though for this one. Maybe it's because I just watched a new release last night called The Dark and the Wicked. Your script reminded me of that. Set on a isolated farm, a dying husband in bed, wife depressed, but in this instant it was the devil harassing them. The tone of that is similar to yours and it got 90% critics on rotton tomatoes. Although I thought the story was too simple. The scripts of yours that I have read are strong with tone and atmosphere which is great!