I honestly don't know if Nuku's got archives of the older compiled versions of the game, let alone if he has them online anywhere. I personally happen to have a few scattered downloads of older versions (zipped versions of the code repository), but they are by no means comprehensive or evenly distributed. They range from Aug 2011 to April of this year. If you want an older version of the game, I guess you could access the
Code Repository and select some point back in the history of commits and see if it's possible to download a copy of the code at that point and time. You'll need to load that into Inform to run it.