well the cube engine is and AC uses it slightly modded i think, we can only move cubes in Y-Axis direction :(
I attached a map I quickly made today, it covers examples for everything that you NEED to know to create a good map and a little building complex that shows what you can do with it. (lighting and sounds are not included, if you load it type /fullbright 1 in edit mode)
you can try to do what I did there with floppys mapping guide to explain ;)