You’re commenting on 24XX, which is a toolkit of resources for making new games. It includes some of the text from Cosmic Highway, but not all of it.
Cosmic Highway is part of 2400, a bundle of over a dozen micro-RPGs. After you make up characters and a crew and set up a job, you play using the rules described in the game—you take turns describing things with your friends. In case it’s helpful, there are some “actual play” videos of people playing linked from the 2400 page, and I wrote a series of devlogs to give more context about each game in 2400.
All the games in 2400 are intentionally minimalistic, like playing pretend with a bit of structure. Some people find this freeing (especially those who aren’t fond of arithmetic, or who find short games with little to read very approachable); others prefer games that provide more rules guidance and examples.
Hope this helps.