Well, this pack series is focused on the building exterior. I actually have interior tileset by the way, but it is still chaotic: in 24x24 px tile size, unpaletted, almost untested (at least for swappability), high-contrast, and very brown. Perhaps I'll upload it when I have time.
Thanks, looking forward your interior tilesets and we will surely buy it too! because if use this exterior tilesets, player will surely enter these buildings so interior is very needed, appreciate!