Really nice visual. I don't think I will ever be skillful enough to get to the ship, though -- if the red dot is supposed to be the ship.
But I really like the gameplay, and I would enjoy having much abundant or unlimited oxygen to float around and explore if you add some points/objects of interest around in space so I can explore or collect before reaching my ship. Could be collecting parts of the ship that got blown out? Well, of course, that is... if you are going to develop the game further, beyond the 20-second jam.
BTW, the name of the game does not give the kind of nice slow-paced search feeling of the game, i.e., the journey -- but sure... asphyxiation is the end game that you want to avoid... but sounds a little horror-themed that I might not click on it to play.