This game is class because it's fighting your opponent and challenges where you can unlock characters and new arenas to fight in. When you have finished challange mode, the screen will go red and you can just fight in versus or tag versus or tag team which i have no idea of how it works but it's class
I've no idea of how well it's rated, but i've seen many other games that work on the same formula (like super smash bros melee!) how far are you on it?