Unfortunately, this dev is under the belief that he can just throw everything behind a paywall and that the sheep will just flock there with credit cards in hand. Instead of offering the full service and enticing users to become supporters due to the amount of work and goodwill the dev offers he wants you to pay for everything, to include the changelog. Numerous suggestions have been made of the most basic game play elements to assist the user in how to navigate the sandbox. These are all met with lip service and a token head nod. Honestly, at this point just unpack the game and you will find the "promo code" in the files. It is evident the only concern here is how to soak the most from a customer, not to provide a solid, stable platform.