This is just my opinion after a second listen, but the song starts getting interesting when the instruments are added to the guitar and vox intro, colors added to the base layer, if you will. Instead of a guitar solo, you might consider a little fretless bass tone under the intro sounds of kids playing, it's colorful but not intrusive. I recommend making the sounds of the kids playing just a little longer; by the time I realized that the sounds at the beginning were kids voices, the guitar and lyrics were already started, the shift is a bit too abrupt. I'd only make the intro 4 or so bars longer, I think the length of the song is about right overall.
I think that the intro sounds of the kids playing sets the framework of the song, good tie in.
Aagain, just my opinion. Stick with it, I think it's a good song
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'I have sounded the very bass-string of humility'