Hi there,
I think the rooms are a little ugly. Not the art itself, but the way a room sets the decorations inside. Could it be possible to have better placements, or even better, to let the player decorate the room ? So by default it could be only colored, and the player has to place some puppets, tables, chests… depending on the room. Maybe from a right click menu on a tiles ?
The room can be less expensive to build, and each decoration can have a cost and efficiency. Not enough, and the room will work only à 30%, 60%… Too much and the room is crowded and will also work less. Like, in a training room, too many puppets can lead the soldiers to bother each others.