Thank you so much for your feedback.
That bug you hit should be fixed now. Turns out all modules (including the keypad) were unlocking from day 1, so you were probably trying to enter the sector code through the keypad instead of the switches, which wouldn't work. Modules now unlock gradually day by day, and the keypad only appears once you actually have access to it, so that confusion shouldn't happen anymore. Appreciate you flagging it, and thanks for playing!