Punch Me Not aims to increase the difficulty for survival players by upping the ante in acquiring tools and materials. If you try to punch anything that isn’t dirt you’ll take damage. That includes stone, wood, gravel and even grass!
This mod requires you to be a bit more careful about where and how you interact with the world around you. It gives some realism to the game since you wouldn’t normally be able to punch through trees and stone without getting hurt in real life. Sometimes you may have to endure some damage for the materials you need, however.