Very nice game, but somewhat inconvenient interface.
Most of all it lacks "undo" function.
Also switching between moving and editing modes is confusing: I often do unintended changes forgotten that I'm not in move mode. It would be nicier if moving mode is non-fixing, like: if you're pressing "control" key on KB, you're moving, if you've released "Control" key - you're editing
So my score is 4 just because it's interface is not as clear and intuitive as I've expected.
That series uses 3d designs made on a computer. Not actual photos. Go away.