On Castle Miner Z you can make A zombie trench by digging around your building at lest 6 or 7 blocks down and 3-5 blocks across. The zombies can't jump over it or out of it, trapping them and making them easier to kill. I also recommend building a stair way down to it, just in case someone falls in the pit
You can build a house or a cave using the Total Miner Forge. The sandbox can help you do it. You can build craft tools, weapons and ammo using the Castle Miner Z on Xbox Live. Check out http://en.wikipedia.org/wiki/Total_Miner for more information.