This was a much slower version of the Galaga game that would succeed it in 1981. Once video games got faster and more complex, I stopped liking them. Would much rather play pinball.
I liked Pac-Man as well. Another video game that was slow and simple to learn.
Cocktail Version as Dr. Sivana tells us. In 1981 I worked in a fantastic pizza/sandwich place called Mr. Gatti's a mile down from Nashville's Vanderbilt University. We had a tabletop version of "Phoenix" that switched views per player turns. After closing and tasks the manager and I sat for hours drinking Gatti's draft beer (dang spillage) and eating orders that weren't picked up while playing that game. Great memory!