EDIT: Oh also
>anything of a possible \R2 directory? The current level structure jumps from
>R1 to R3, and R2, a long-lost missing level, is, of course, not there.
Kakuta-san explained to me the manner in which the games was developed: each level was "owned" (coded and debugged) by a single engineer, so there was a separate engineer for each level (they were in charge of all three "phases" of the level, "past", "present", and "future"). These engineers worked entirely in parallel and independently. Kakuta-san did the "framework" code to "hold all the levels together". He said the original (Genesis version) of the game was done the same way. I asked about the R2 level. Although not explicitly stated, my impression from him is that the designer of level R2 didn't do a very good job, so they left it out of the final product. It was never shipped in any form.
Okay fine whatever, I just want people to shut up. R2 has no trace in this or any dumped beta so don't ask again. If you want R2 go contact the guy from the Sonic 2: Solid Gold Guide or Sega Japan.