This is cool, though the notes in your example look pretty random? Are they actually randomly or is it just too modern for me to hear it without playing it? I'm a fairly average pianist, but sight reading is a (relative) strength. Being able to play random notes is definitely part of it, but I think for me sight-reading is more about getting a sense of the gist of the music (a lot of pattern matching of common phrase…
It's the difference between learning to recognise letters and learning to read words. Music is made of words - scale-specific gestures, of which there are hundreds, perhaps thousands, typically arranged in some kind of harmonic context so you can make reasonable guesses about what's coming next.
This matters because finger positions have to be optimised for the smoothest and fastest motion. Piano sheet music usually includes this information, but random note sequences won't.
All of it contributes to look-ahead, where you're reading a bar or two ahead of the music to give your brain time to assemble the finger movements it's going to need.