Thanks George. I wonder if we're talking at cross purposes. Listening to your earlier recording, it seems to me to be very similar indeed, if not precisely the same notes as the one posted here, and you talk about it as a piece you've played several times (and recorded without edits, perhaps). Now, I don't mean this as a criticism at all, merely a technical point. And it could be me who is using the term wrongly - that's what I'm trying to figure out. I have several pieces that I can play through. I haven't written them down on paper, but I know how they go. I may also play them differently, swapping sections or shortening them, even changing the rhythm. That's not "improvising" in my understanding. It's "composing" and "reciting" established pieces. Improvising is where you sit down at the instrument and make stuff up you've never played before.
Obviously, all musical performances will be on a scale somewhere between those extremes, because nobody can play a piece exactly the same twice even if they try, and nobody can be sure that they're not repeating some sequence they've played before (or heard before). But you get my drift, hopefully.
When I make things up, I make attempts, try different things, try to remember the good bits, and gradually work out a piece. So improvising is part of composing, towards an end product you can repeat. Improvising something like yours here - to me - would mean you've never played those notes in that order before, or anywhere close.
I'll end by repeating that it doesn't matter - what you've composed is something to be proud of, I just rather wonder if it should be in the parent category (or if there's another section for personally composed recitals as opposed to playing Chopin or whatever). Sitting down and improvising what you play here without hitting 'bum' notes would be another level of difficulty, IMHO. There are recordings here like that, and I think the players have a refined knowledge of music theory and/or a lot of experience finding their way around the keys.