I'm surprised nobody has though of this (I've made a topic on it before and it didn't get much attention), but the only way to have a fully working controller layout WITH building would have to require two modes in blockland: player and building mode. In player mode, you walk around and fire and all that as usual. In build mode, your camera would lock onto your ghost brick and you would be in control of ONLY the ghost brick. So you would be observing your ghost brick basically. You could build as normal in build mode, and can revert back to player mode at any time.