i dont see how that is relevant, its not like he coded himself into a corner that only allowed 1 last update.If you had read through some of the forum, you'd have noticed that the dev had said this was his first and a trial and error game for him. So that is why he kept it short.
he simply decided that it wasnt worth it to keep making it. nothing trial and error about it.
a couple more updates wouldnt be any harder than what was already done up until now. its just that he didnt want to.
also, he did not kept it short, the game is filled with irrelevant characters that seem like they will have any interaction, only to not have anything, a short game would have very few characters, and that was it, PT wasnt like that.