Absolutely loved it!
Please let me know if there's anything after the player gets told they're dead, it seems like a sad end to a fun little game.
I had some issues understanding that you have to hold space to tether, got me killed 3 times, might be something to think about.
Fuel isn't really well explained, I finally understood that I get fuel only for that one push and then I'm out (which doesn't read well, since it works exactly like the oxygen otherwise, so I expected to "fuel up" - and I didn't).
Other than that, it's agreat idea, very well made, has character, the writing is good (I was like south-west? in space? and then the character asked the same thing - brilliant), I strongly suggest everyone to play this one ^^