Clean guitar! I'm already being brought in! It may just be that I really, really, really like delay also. It sounds like you got some good rhythm going, but I can hear a little bit of distorted clipping going on in the sides that fuzzes up the mix a little bit. If you can control the EQ of tracks, look into that. Of course, it also helps to make sure that they aren't too loud, as that is usually the common cause to clipping.
I like those harmonics! But I think that they are little too dry for the whole track. Maybe you can toss in a little subtle reverb and delay to help it fit in with the rhythm? I think it would also be worth experimenting with chorus as well for something like this.
Vocal chops are solid, dude! Of all the instruments I critique, vocals are definitely the hardest for me, but I don't have any problem saying that your voice fits in well with what I think you're going for.
Not related to the rating, but if you ever know a guy who can whip up a drum beat and bassline for you, I think you could really take something like this to the next level. If you're cool with just the acoustic guitar, then that's fine as well. I know what these kind of songs are meant for.