The problem, as I see it, is that gamers don't play games from every genre. I play RPG's, Adventure and Strategy games only. I don't play retro shooters, I don't play retro puzzle games, etc.
How anyone can play enough different genres as well as enough different games so often they would know all these tunes is so incredibly difficult that I am not even sure these DS's exist and Abandonia intended to give them away!