Yes, I understand this desire for text in the original post to be optional! You can always put just a period or so. I don't want to put my perception on your improvisation, but I'd like to at least comment about what I hear. I am listening right now and enjoyed the "dramatic" opening, eventually leading into a portion in the higher register which had a kind of sweet feel to it. I also enjoyed how your left hand kept a kind of suspense between "sections" at one point (sorry, I can't give minute markers as I listen just on the mechanism here). Some fun scalar explorations that gave me ideas. And then how it just kind of faded off and came to an end. This is one thing I think about regarding improvisations in general, or something that's been on my mind anyway, are the use of cadences (or not). I have almost no improvisations with a candence at the end (well, there is at least one which has it, maybe more). Overall your improvisation was inspiring and idea-giving for me!