Great track!
I personally would just leave it as an acoustic song, and add normal singing over it. To me that would sound a whole lot better then turning it into a hip-hop song, but that's just my opinion. This song is very relaxing and I can really get into it. I think I can hear some fuzz in the background, which really pulls down the quality. Have you tried using some a noise remover to get rid of the excess noise?
At 1:01 there is a little skip, and I think I hear it a couple of times. This just sounds like a slight mixing problem and can sometimes be hard to fix, depending on how you recorded the track. I know from experience that this can be a huge pain to fix.
Throughout the song it sounds like you have some reversed notes or something to mix the sound. This sounds really unique to me and I actually like it a lot. I'm not a huge fan of the ending, where it gets all crazy and messed up, but I think it somewhat fits the feel of the whole track.
I like this tune a lot. Great work man!