I couldn't get it to work in desktop mode. I tried left and right mouse, click and drag, etc. no luck. Middle mouse did allow me to pan the world. I'll have to try again sometime. -- I tried again and I was able to place some wood, but could not place furniture. -- will try yet again, looks like an interesting idea.
Wow, now that I figured it out, I loved the bombardment of my structure! Wasn't sure how the bombs fit the theme, other than of course they do a lot of damage. Fun physics, I'll give it yet another try - smiles in advance.
Woo Hoo! My build passed! My trick was an angular collection of shields within shields.