I restarted the game since i had some confusion and disorientation the first time i played it but i managed to beat the game the second time and i quite enjoyed it.
Game has a Doom kind of level design where you take key cards with different colors each opening a door with the corresponding color. But you added gravity puzzles into the mix which actually rotates the room when you interact with certain buttons. I think this is a brilliant idea and very well executed. Depleting oxygen adds tension to the game, maybe there are too many oxygen tanks sprinkled around. They could be less tans strategically place around the map to raise the challenge a little bit. Autosaving when using the tanks are nice.
The graphics has kind of a Doom feel to it. I like the ambience, there's a planet outside the ship, that's a good touch. Really makes you feel you are in space. Controls are snappy and feel good. I wish there was some kinf of combat which could make it fully a dungeon crawler experience but considering the time constraint and you developed this solo, i think this is a great achievement nevertheless. Well done!