Great melody choice, i do like this... nice attempt sir very even tone, a little tricky over the changes i know but you do aim high going for improvisation on this melody but go for it i say feet first as you can only learn from it. Also looks like you are developing your own sound quite quick too, nice 1.
another thing with this melody, maybe you already know this, is that the old 'star trek' theme tune was built upon the changes of this tune, try playing it over and see, i sometimes quote star trek when i do this on a gig.