Actually I joined them last month and produced all of these from scratch 2 weeks ago. Apparently the game engine was created/functional since 2011, but the graphic artist is missing in action so I don't really know the status of the progress. The main programmer was also looking for another artist to create the tiles and maps.
It will take some time, however having also handled all the cutscenes of Pier Solar, I don't think the game will be as massive and time consuming to create as PS.