Great world building, interesting characters. I believe I got ending #2, but I didn't double-check.
For anyone looking for a game to play, this is a neat choice, but I can't recommend it in its current state. Disregarding the loose ends, I spent about half the game in mild annoyance.
The asteroid sequence was quite tedious. To ditto off of what Ace Frahm said, it was too long and too boring. However, I don't care about the 'realism' part of any of it. If we cared about that, we should be wondering about the realism of cryostasis, aliens, faster-than-light-travel, etc. Realism in video games is often unachievable, unless it is the explicit goal of the game. So no worries about that. However, the tedium of avoiding asteroids is what changed my mind about playing the game again.
If you need ideas to fix it, you could add a difficulty curve, as well as longer periods for increasingly longer journeys. My suggestion would be to lessen the amount of asteroids in the last jump or two, for atmospheric reasons (makes it feel much bigger and empty).
However, I believe it would be more in line to instead add more to the computer overall. Perhaps some newsletter you can optionally read, but only while eluding asteroids. It's even better if Lento asks you not to read while simulating. And then you do it anyways.
These newsletters could be about the solar system you are travelling to, or the current activities of the universe. At some point, there will be no newsletter, but rather rogue signals from surviving solar systems. Calls for help and other similar messages
Finally, there seemed to be some loose ends. For example, at the beginning you sign a contract. But it never comes into the story of the game? Or maybe it does, but not in the path I took. Regardless, it feels as if the story ignored some of the crucial beginning parts. I barely felt like a refugee ferrier at all, and more like a freelance ship.
That would have to conclude my comment. Good luck to all of you, and I hope this game gets more development.