I couldn't tell you that. :/ All I really know about the song besides what's obvious is what it's about. The song really doesn't have that much to do with Mega Man/Rockman 2, as it does with a depressed young man in Japan, remembering (and missing) his childhood friends. (aka why they made facebook.) In this sense, the idea behind the song is similar to that in Chrono Trigger and Chrono Cross.
And now, the Moon theme from NES Duck Tales
http://www.youtube.com/watch?v=fHEgzRtKC5o"Wait uncle scrooge, you need a suit up there..."
"how are you alive, you need heat! You need air!!"
"That's gotta be, one expensive cane..."
"You are up on the moon, looking for treasure, YOU HAVE GONE INSANE"