Found 1 rating (with comment) on this game

One of Williams' few one-flipper games of the period, this is a tough one to rate. Maybe it's best just to break it down in categories.
Art: Super. Colorful and fun, and the theme is such a neat 1950s futuristic fantasy.
Sound: 3 bells is as good as it got then. Very nice (and not too loud).
Gameplay: Ok yeah it's hard to say. Very unique and very fun. It's great to try to get that extra ball. Difficult too, as is getting all the numbers. The single flipper is an impulse flipper too - it flips and goes back down even if the button is held, and there's no place to hold the ball anyway. The lower right slingshot keeps the ball in play otherwise. Nudge all you like, but you don't have much control in this game. Ball times still aren't too brief.
This playfield will need to be precisely tuned. From the lower left kicker lane, the ball has a tendency to bounce off a bumper and go back in the lane. And you'll be playing with the glass off if the upper kicker and habitrail aren't just right, as the ball will get stuck there.
This is more of a period piece than a player, but what a piece it is.

One more note: these unusual Williams games weren't popular at the time and very few still exist. (Thunderbird, Rag Mop, and Nine Sisters come to mind, none of which I've seen. I don't know any other similar games offhand.) It makes me wonder what people will think of games like Spy Hunter 50 years from now.

*Wife approval* She really got a kick out of the impulse flipper. "This is neat!" But she seemed a little hesitant to say anything negative, knowing this was a rare and special game. "I kind of miss having a flipper on the right side."