I've been watching this one with anticipation and hope for awhile, I think I can clear up some questions.
The app was originally submitted identically to the way it is now except that it had BASIC fully functioning as well. All 5 current games and all future ones are/will be fully licensed and everything.
After being rejected, the developers got in touch with high-ups at Apple and cleared things up. The end result is obviously that the BASIC had to go.
My guess is that future games, or at least the bigger hits, will be sold and the rest will, if there is some mechanism for it, be offered for free.
As it has been approved, there should be no real obstacle to the developers rapidly expanding the library of games. If there's something you're looking for (Please God give me MULE!) then it'll likely show up eventually. It's a beautiful full emulator not a simulator, so the content is the only potential problem now. Oh, and I really had my heart set on the BASIC interpreter. Oh well

. Easter egg update, maybe?
Nate