This game was a blast! While the art is simple and it's lacking much animation, it was still charming. I enjoyed the music and sound effects. I thought the beeping when you were running low on oxygen led to some great tension and I found myself slamming my keyboard to reconnect.
Maybe some variation in the asteroid size might have added to the visual variety and animating the flame booster would do a lot to help sell the immersion and you could accomplish that with just a few frames.
Overall, I really liked it and thought it was an interesting take on the theme. By being joined together you're hindered, but without the tank you die. Awesome idea and great execution in such a short jam!