Really interesting idea, I simply feel the controls are really hard to get the hang off, like the tutorial is fine for learning to control one but then you are instantly thrown to two and the whole thing changes because you now have the rope, I think some easier levels, or having the tutorial be with the two astronauts right off the bat could help.
I personally think it would be fun if you could give a big push to the other astronaut if they are really close to one another, I think that could provide some interesting movement into the game.
Also love that you added voice acting into the game, really impressive, and it's really good, it feels like a mission control communications.
Overall, nice idea, I hope that you are planning on working on this game further in the future, because if that's the case then I can't wait