I bought it and just completed the tutorial. You can hold down for precision aiming.
I can take a picture of my house in about 2 hours. Build wall panels at a workbench and fill your entire house with them if you haven't already. That's what I meant by inside walls.
I'm liking the controls. Doors open automatically and you can auto mine. On PC you have to click everything. 1 block at a time. Options look like they support Moga.
I made a video instead of a picture. Xsplit doesn't work right without my 2nd monitor, so I wasn't able to make it as big as possible and there is no audio. I messed up a few times, but was holding the phone at a weird angle because the wire is messed up and the phone needs to be held a certain way for the computer to recognize the phone. I think after an hour or 2, I would be able to adjust.
At 3:10 I was having problems putting walls down. Not sure if that was a bug or if I was doing something wrong. It does start working later. You know the game counts it as a house when the guide moves in (face banner shows up).
Update: After about 15 minutes, the controls started feeling great. I figured out why the wall wasn't working in the video. You press gently to zoom in, then press harder to actually put the wall down. My 2nd house went a lot smoother and took under a minute to build.