You have a good sense of tone placement, but i would say you need to work on varying up your phrasing repertoire. Although the notes you use are pleasant, the simple progression through the notes loses the listener's attention after a bit. Try to develop an intuition for hearing what you want to play before you play it, and then the technique required to translate that right away. Just keep loving it and really it all kind of takes care of itself I suppose. All in all well done for a quick and simple improv session.