The game is still a work-in-progress, while i’m building the game, the current version available here is the free version. If you want the up-to-date version of the game, check the end of the description.
You only have one sub tier, and certainly they deserve the most current and up-to-date. Not asking for the world here, just maybe one version back from current. Even two versions back would be 0.1.3, one better than what's up here and getting stale. It's work already done, you really can't extract any more income from it, so why not update to *.3 or *.4 here?