If there was a mod that made the game harder, it’s probably there
If your on the ground, every mob will swarm you and you will die
If you are in the sky, zombies will build up to you...and you will die
If you make walls, zombies will break them and creepers will blow them up...and then you will die
Your only hope is to hide underground and pray they don’t find you...OH WAIT: if you stay underground then you will die because torches give off pollution (so do furnaces)
On top of all that:
Some Zombies have guns
Zombie Pigmen have guns
Baby skeletons exist
You can't punch trees
Tornados exist
Pollution is a thing to worry about
You need to drink water and keep your temperature reasonable
There is no natural regeneration
You have specific parts of your body that can get hurt/healed independently
There are many other mobs that will kill you on sight.
and more...
