Ok so i see that you explained above about alpha 1, 2 and 3 and their differences. With alpha 3 being the most recent. But when I go to download the game, via the link for those who purchased it..it says updated 9 days ago and says Alpha 1. Did you decide to call all the updates Alpha 1, but insert new version numbers when you posted them to itch? Lol I was looking around for Alpha 3 and got confused.
Yea, alpha number represents a stage of development: Alpha 1 -> Alpha 2 -> Alpha 3 -> Beta 1 . . . and so on. Some kind of milestones, game is currently at Alpha 1 stage. I think I'll add a roadmap later.
At any given moment there is only one version of the game available for download, so you can't get older versions.