Really cool concept, but I gotta say that the movement is so sloooowwwwww. I know you are on the moon or something but that isn't an excuse for slow movement. And the Oxygen mechanic would be nice.... assuming you could even see your Oxygen.
(Dumb question but uhhh, how does the gameboy convert hexadecimal to decimal, because that is probably the only problem I can think of that made you not put in a Oxygen meter / number :/ )