Hatchways adds simple Hatchways that you can go through by opening them.
-You can open a hatchway by right-clicking. 
-When a hatchway is opened it isn't solid any more letting you go through. 
-Hatchways can be rotated like logs. 
-Hatchways are crafted using 1 Trapdoor and 1 Barrel.
The Hatchways Team
