Nice arrangement, and well sung! The instrumentation did a great job supporting the lyrics, as did your vocals.
The triplets in the melody against the marching snare were especially effective.
To be honest, any song that has the first three lines in a row starting with
"How many..." immediately brings me fear of sounding even a little like
"Blowing' in the Wind", which would scare me away from even
thinking about arranging it. (Not that I'd come close to what you've done).
And of course, your arrangement sounds nothing like it. In my book, you've earned pile of extra kudos for that bravery as well.