From the description, I expected a genre parody along the lines of something like GalaxyQuest (1999). That is not quite the case. Zen Kajiwaras alien husband is made up like a Vulcan from the various Star Trek franchises, while some of the costumes vaguely suggest Star Trek uniforms. On the other hand, there is no clear sense that the film is spoofing any specific targets. Rather what it resembles is Space Station 76 (2014), a retro-styled comedy that borrowed the look of sf shows of the past but otherwise followed various characters in their daily lives around a space station.
Like Space Station 76, Galaxy Turnpike has been intended as a comedy but sits less effectively as a science-fiction film. As science-fiction, it is light and fluffy, someones idea looking down of what the genre should be ridiculous aliens, strange happenings rather than something that takes it seriously. This is surely evidenced in some of the very silly things happening around the station which is designed like a roadside diner on a literal highway through the stars; where mail delivery vans stop on the clouds en route and the driver gets out without having to worry about the vacuum and a mysterious air blows the mail away; where the turnpike itself is sentient and manifests toons and a mime to persuade bureaucrat Yasunori Danda to not shut the place down.
The script has several characters and interactions that make up its running time. These pass back and forward with a snappy vigour, although in the end there was never anything about the film that I found particularly funny or amusing. The station itself is well designed, although the CGI effects of the giant Captain Socks are uncommonly shoddy.