After I activate the control unit and click it again, all I see is this:I tried clicking on the picture of the control unit on the right side of this screen, but that didn't do anything, either. Doors are all still closed.
Aha, that did it. Maybe it would be more intuitive if you put a little triangular play button in the bottom right of the control unit menu once it is activated, so that the control unit would work much the same as the furnace?
I have quickly patched it using available assets, hopefully there is no other pixel hunting like this. Please get the latest binaries. Thanks for playing the game! :)