This is not an officially sanctioned release of the game; it's a leak of a heavy work-in-progress and was never meant to be posted anywhere. I'd like to ask everyone to refrain from playing it unless you want to be misdirected as to the true nature of the game's final release.
It sounds like you're getting experience with the PR talk. I hope you're saving some of these builds for after the game is finished, I think it would be very interesting to see how things changed throughout the development process. You've changed a significant amount since the last release. This build reminds me a lot of the 05/10 build of Sonic CD.
If you don't mind, I have a couple of questions for you. According to the header, the ISO for this version was built on 06-28-2011. Do you know if this reflects the current code on that date, or did someone build it from older data? Also, did Stealth write the new special stages from scratch, or are they based on what they resemble? (I'll avoid spoilers for you)
Overall, your choice to have this version pulled from distribution makes sense. It's definitely much more incomplete than the previous releases, someone who doesn't understand that might get the wrong impression. However, in it's current state the game shows great promise and seeing this makes me further appreciate my decision to pre-order the game from Amazon.