Castlevania: Aria of Sorrow is a metroidvania era castlevania game that has perhaps the best balance of difficulty of the Advance collection games, it is easy in the beginning but towards the end there is enough of a difficulty to need mastering some enemy move patterns and tactics, yet there aren't too many unfair enemies or rooms (except maybe one room with petrifying enemies and conveyor belts that nearly instakill you). Music is awesome most of the time. Still a bit of grinding to collect monies and souls and whatnot, especially going for the best ending, but not too bad.