Hi there. I created a "walkthrough" video of the incredible, largely forgotten masterpiece, Atari Gravitar (1982). It's my all-time favorite arcade game and it has kept its appeal through the decades.
I hope these video(s) give you some good playing tips. It's a video capture of one full game played (everything completed, full loop, game "clocked"). I used AAE Vector emulator which is the best substitute for the real thing.
Enjoy!