One trick to writing a sound short story is to craft something that is whole and complete, that is at the same time clearly a tiny piece of a larger whole. A world within a world. Structurally, Ambroziak nailed it with this story. I was completely engrossed by the up-front action of the story, the mystery, the murder, the artistry, the tragedy, all of those pieces that are woven on a tiny loom into a snippet of this man's life; all the while, hints at the rest of his world are provided that made me want to crack the glass of this perfect little snow globe and get a look at the story outside. But at the same time, I'm almost loathe to do so, because the hints given as to the nature of that larger world are pretty disconcerting.
As to the overall feel of the story, there is definitely a Twilight Zone-esque sense to it, but in a beautifully unique way. Where Serling often focused on the feelings of his individuals, Ambroziak's focus in this story is grander and more abstract. The central character, Alexander, is in fact, at a remove from his feelings. He is entirely possessed by his music, his interior reality, dismissive of all else to the point of tragic destruction.
While the tiny, concrete details in this story: the piano, the tabby cat, the charcoals, the neighbors are all utterly real and compelling, the real focus of the story is on the workings of the universe, the distinction between fate and destiny. The notes Alexander plays intersect with the larger orchestra of his world to determine the end of the piece, or at least the end of his part in it.
I am enchanted by this story, and enthralled by the writing. I am also beyond thrilled at the thought that I have not only one but two more stories by this author lined up in my queue!