Looks very interesting, but I ran into an issue with the tutorial: I can't select anything from the "turret shape" drop-down menu.
Also, when loading a mid-tutorial save, I end up stuck on the main tab unable to select any options or navigate to the things the tutorial wants me to select. The only way out is to close the tutorial box, and I can't find an option to re-activate it once I get to the tab where I left off.
(Online; Firefox on Mac. Tried turning off adblock / tracking protections / etc. Nothing up to that point seemed broken.)