How do I use this? I built one, made one deploy charge, undeploy charge, and 1 energy transfer port. I starting hitting c and spacebar and it stopped moving. Now I can't move it, the deploy charge has been consumed, and I can't move it again. I've tried hitting tab, c, spacebar in different orders, but I can't move it and I can't mine it.
Is there supposed to be a status indicator showing the current "weapon"?