Hello! The Early Access Club version is already out on itch.io (DRM-free) and on Steam so it can be purchased now,  and you can play the Act I and II of the game. Act III is coming later on this year, and Act IV (that is, the "final" or "complete" version of the game) will be released a time after that, when it's done. Naturally, purchasing a copy of the game right now on either store will grant you access to all future versions of the game for no additional cost. Let us know if you have any more questions!