https://www.youtube.com/watch?v=OYW183yBmRk

Link to what's happening, basically I come back from an afk session of about 20 minutes I went to make food, then when I go check on my creeper farm/concrete converter+tnt duper my whole game just breaks. Things are interactive but don't do anything, like sand falling if one's broken beneath it etc. I'd just love some help it's the first world I've ever made, I have no back ups, as well as I just want it gone at this point. I don't care about the hard work and the amount of resources I had up there I just want to enter that area without everything breaking.