So, did you want to leave your mark on the world ? I think it's done, or at least in the memory of everybody who will one day read your text. It's just incrediblely (yeah, I think it doesn't exist, but what does, anyway ?) weird, and strange, and at every moment you're wondering what happened, and you don't really know, but you still go on reading the story. I didn't understand the italics words at first, but then I get it was the real thing Draco want to think, or some words that occur to him after thinking the first word, and I think it's a brilliant idea.
I like the conclusion too, the understatement of his death as the only conclusion.
I wonder if, if you read the texts in alphabetical order, it could give something new ... Let's try it !