Replay levels relate to the score at which a replay/credit if on site or user adjustable to say extra ball and how many replay levels or scores are available per game.

You can change the number of replays your machine has and at what scores they happen.

So are you saying that the function here can be adjusted to give extra balls at various scores?  For example if you also changed No.4 "Game Awards" to Extra ball instead Credit then you'd be able to adjust the number of score based extra balls as well as the scores they were awarded on.?