Nicely done securing the balafon and for using vocals! Unfortunately, I don't know much about Ghanain music or the local tribes there, so I can't comment on style except to say it sounded kinda like 12 bar blues. Make that a lot like 12 bar blues (which gives more form to the piece than you probably wanted). The good news is the blues extended from West African musical traditions, the bad news is I can't shake the feeling that this is just a jazz piece, with unique instrumentation.
Well done (especially recording/mastering), I enjoyed this track a lot!