I would disagree with KMT on his first reply. If Apple felt your app was too similar to existing apps that would have rejected it with 4.1 Copycats. I would just keep following up with them. It might not be clear to the reviewer that there are multiple levels depending how the user progresses through the game. I had 4.2 rejection for a simple utility app and I just kept adding features until they finally approved it.
Topic:
App Store Distribution & Marketing
SubTopic:
App Review
Tags: