Shouldn't you call it beta version instead of alpha version? The reason why I'm asking this is because alpha versions are for an internal testing group, while beta versions can be played by almost everyone with the standard requirements.
You know how you only have to donate at least 1 dollar to the game to test those versions you call "alpha versions"? That's a very cheap price. And did you know that anyone, no matter where they are in the world, can donate to this game?
Like I said before, beta versions can be played by almost everyone with the standard requirements. Did you not know that??? The fact that anybody can donate to this game clearly does not match with the definition for an alpha version.
I still support you and your work though, just remember that alpha versions are for an internal testing group, while beta versions can be played by almost everyone with the standard requirements.