Hey, FYI- at least for versions 1-5 they're all 32-bit, meaning if you use a 64-bit system, they won't run.
Also version 6:
The Knuckles and Eggman levels exist, so only the Tails level is introduced, while the other 2 are improved, with the black ring mechanic.
Also mention the curtains!
Update on the 32 bit thing:
Version 1 and Version 5 seemed to run out of memory for my setup- so that is something to keep an eye about.
