Instructions
Click "Build Mode" and select the "Wall Tool."
Create walls for the first level of the house. Click on an empty square and hold down the left mouse button. Drag the mouse to create a wall.
Click the icon that looks like a house in "Build Mode." Select "Up" to create a new level for your house.
Click on "Staircases" from the "Build Mode" menu. Select a staircase and place it on the ground floor in a location of your choice.
Select the "Wall Tool" and create walls for the second level of your house.
Complete your house. Add inner walls, create floors with the "Floor Tool" and add any additional finishing touches.