One of my all-time favorites...big plus to the music sound track, the rocketships and the rocketships' buzzing sound when they fly.
And of course, the acting, the plot, the scenery. And some of the greatest lines ever, like when Flash asks Dr. Zarkov if the rocket will fly, Zarkov answers nonchalantly, casually, "I don't know, I've only tried it with models". Ha !!! Big plus !!!
