Thanks magma-rager! For now, I dropped reference to this being based on the Solar Echoes RPG, since I think it might discourage some people away because they're not familiar with the TTRPG. The Star Legation can be played without any prior knowledge of the game universe, since it is essentially a pre-history/introduction to that universe. I do have a brief mention of the TTRPG at the very end of the game after it's solved, so hopefully that will encourage people to look further. Thanks for your suggestion, and be sure to leave a review if you try The Star Legation, I'd love to hear what you thought of the story and the characters!
Best, Andy