https://nookipedia.com/wiki/Happy_Home_Network_Design_Contest This lists several of the DLC content. The game itself is quick but very enjoyable. I only gave this 3 stars because they really should have included allowing friends to visit your town. Adding a hard mode where you can fail a challenge. Basically this game just needed more of everything but characters! There were bunches of fun characters just not enough to do with them.
