Very atmospheric and nice to listen.
Blues is one of my favorited music genres...
As usual when I listen blues track - In my eyes appears a picture of nightlight city... :P
Like the guitar at 4th minute...
All in all the melody is pretty solid.

I wish I could give a fair review, but I'm just a freelance-composer so I don't know
what's standart properties a blues track should have...
BTW, I hope you'll finish it and It will be in full beauty. Looking forward for your new works!