I sense there is something very powerful buried in here which is worth spending time to grok. My understanding is that this is a Forth system, that tries to ad

I sense there is something very powerful buried in here which is worth spending time to grok. My understanding is that this is a Forth system, that tries to address a big problem with such systems, the messiness around "immediate" words, etc. It does this by using a global variable called crank. Am I right?