I remember this one. The gameplay was mediocre and difficult, but there was quite a bit of novelty in the whole "cockpit experience". Lighted panel buttons that controlled the individual defense rockets, the overlaid real world cursor and the moving screen were definitely unique.
Folks should probably cut the engineers of this title some slack, though. They were after a specific feel, and there really wasn't a better way to achieve it. Big monitors at that time cost big money...more than a couple of motors and some chain. And if they wanted a big image, that would have meant using a monitor that was twice the size of the playing screen. So large, in fact, that it probably would not have even fit inside the cabinet. The issue with size was made even more important considering they were trying to provide the player with a sense of depth, so that meant placing the monitor back and away from the player. The further away it is, the smaller the image appears. So they came to the only reasonable conclusion, which is a movable fold mirror for vertical motion.
And if it does actually rotate (the MAME version doesn't), that's an effect you could only have achieved mechanically in those days. Big pixels and slow processors would have meant slow, poor visuals or the requirement of extra, very costly components.
All in all, this was engineered the only way it could have been for the time period, without a true flight-sim price tag. Which is pretty good considering actual flight-sims did pretty much the same thing.
A very cool addition to anyone's collection. Congrats!
RandyT