Well if you're good enough with the composer then you can recreate any song you want. I done a few video game tracks myself on the first band bros. I'm sure someone will make a midi hack for this one as well though.

If you think about it they could potentially add more Download songs, or change the list completely in the future . I think the ability to upload your own compositions is what will really make this game shine. People will almost definitely be recreating a lot of jpop and video game tracks, so if theres a song you want chances are someone has already made it and uploaded it.