Actually, the lead towards the climax was my own personal aesthetic choice, I thought it gave it a little added punch. I was kind of wondering if people would enjoy it or find that it detracts from the overall feel of the song.
Just got done covering "Moonsong" using the NES sound chip (plus VRC6 chip). You can listen to it here:
http://8bc.org/music/mag3b/Cave+Story+-+Moonsong+(VRC6)/