To be honest, I don't think you'd get in trouble for using a "copyrighted" song/music whatever in some old shooting rabbits game. It isn't a massive community like youtube where you have to make misleading titles to get away with such things and you aren't reselling it. J2o admins might go on at me for this, but what music company would check such a primitive site? What about videogame music? I've seen several people use music from other games in levels and they don't get into any sort of trouble at all. Even popular levelmakers do this. Maybe there's a difference, but I don't know quite exactly how it is...