I am at the top of the cliffs at zombie island, and when I try to look through, nothing happens.
I have placed the Creeper/net contraption on top of the rock, but I can't move around to look for it.
What do I do?

Use Theodolite ( it should be placed in holes on the ground) then click on the right side of the screen (black area). Scroll view untill you see shiny thing inside creeper/net). It should open new patch from the cliff.