Have owned one of these.
If the balls are not in the correct positions at start up then game gets confused and you can end up with no balls to play or all 3 balls at once.
I reckon this is why it bombed on site as operators had so many hassles with it. Its also NOT documented in the manual for this game and having balls in exact positions is something that i had to work out.. that took a while!

After owning this game i also swore that i would never own a machine that had no bumpers ..

But yes... its a rare game with a stunning BG