1:39 caught me off guard in the best of ways. This is a wonderful little improv. Reminds me of broove, which I'm sure you'll appreciate. The improv is weird in the best of ways. You explored some harmonies I don't hear too often, but that actually make for a hauntingly beautiful sound together.
I'll look forward to when you end up releasing all of these, even if it might be all at once! Also, I just reached the heavy bass notes. You really managed to incorporate some pretty heavy dynamics into this improv :O
I like the idea with the two notes; your idea definitely worked out for the best. Keep it up!