Pulling yourself up - using a rope?

[Apjjm]

You can create a rope using a PosNode and a RopeArea. You can use a block_box entity variety (or some other entity) as the entities to attach to the ropes to. There are lots of settings you can tweak there to make your ropes look suitable.

maps/ch01/06_distillery has some ropes used in the hatch puzzle there you can take a look at to see how the ropes are set up, the pulley entity is used there as the entity the rope is attached to IIRC. The bucket puzzles in the nave/cells feature some slightly more tricky rope stuff which lets you move the rope up/down but this is probably more than you are looking for in this case.