The story begins from cleaning up the attic, but as you progress with the story, you'll be able to go to other rooms and mansions.
◆Going to another room
Pinch in to see the house map, and then tap the room you wish to see.
◆About the furniture
Because it is Meowogh and his friends who decide where to place each furniture, they cannot be moved around. However, you can always tap on the furniture to find out what Meowogh thinks about them.