kurgun2018

I'm in explorer mode and I wanted to try building a building. My question is, if you misplace a block or piece let's say, how do you remove it or erase it, once the timer reaches 0 and you can't pick it up any longer? I tried hitting with the weapon and it never deletes or gets destroyed. Also,. is there any way to get to the roof of your build besides placing temporary tiles in free place mode that you can then use like a ramp?