The operation of the Z1 is something I would like to understand better. I understand the gate level interactions -- and even designed and 3D printed a few myself a few years ago -- but I am still wrapping my head around how to integrate them into a communicating (and computing) system. Unlike electronic logic, how you transport signals really matters quite a lot here.
This simulator seems to be a (potentially) excellent learning tool for making that next step; though -- admittedly -- Zuse's designs are so tightly integrated that they remain quite inscrutable to me.
Thanks for developing this, and I look forward to spending more time with it.