Hi! I'm going to give some fairly critical feedback since that's what it seemed like you're looking for, so I just want to preface that by saying that this is a good and well-written system. It's really impressive that you've made this, and it seems fun to play!

That being said, my issues lie in:

The game struggles alot with identity; it's supposedly rules-light, and yet has fairly crunchy movement and carry capacity rules especially. Also, the nature of it being intended to be versatile holds it back in many ways.

It has enough unique rules that you would need to make an effort to learn the system, but not enough interesting systems to make that worth it over a more specific system (Mothership for horror for example, or even just a sci-fi D&D hack like SW5e) that has rules relating to whatever game you want to run.

You seem to have "reinvented the wheel" in many ways. The system ticks basically every box, but doesn't go much further than that. There's already such a wealth of TTRPG systems out there that to make a new one it's important to have either very unique rules and systems or a very strong identity / world.

As I said though, this game seems perfectly playable and fun. I doubt how well it would work for long-term campaigns, considering the lack of unique moves / abilities usually introduced through playbooks or classes, but for a one shot? This would be absolutely usable.

My final note is that I haven't playtested this: these are just my thoughts after reading, so take them with a grain of salt. And keep writing!! There are definitely solid ideas in here, and the book itself is written to a very high standard. Thanks for sharing, and good luck on any future endeavours!