This website has absolutely horrible controls, terrible graphics, and is ultimately useless. Good for home economics classes... BARELY.
I was attempting to build a house it the app, delete button was useless so I had this full scale window on the thinnest of wall segments. Making walls does nothing but put a line on the floor when you enter 3d mode. Whenever you use the room painting tool, there is no way to stop adding nodes to the room, causing you to make the ugliest shape imaginable and you have to go back a redo it a hundred times. It's decent for a free site, but if I were really trying to design a home, I would rather draw everything by hand than use this site, and I suck at drawing.