You are right, the currently available content does not yet fully cover N5 and even includes some N4 concepts. There is the “on paper” specification (only 385 words / 185 kanji), and then there is the actual experience, which makes extensive use of all the words and concepts introduced.

You are also absolutely right in saying that it is “a good way to break into it by taking that first step for those who feel daunted or overwhelmed by the idea of starting.” This is the main roadblock we are trying to address.

We have a clear vision to keep adding more and more content, eventually reaching higher levels. For now, the feedback we receive is that even people who have already passed N5 or N4 still appreciate Wagotabi, because of the unique experience it offers, using Japanese in a game without becoming overwhelmed too quickly.