I enjoyed how the game spooks you with the blue friend at first. My criticisms are similar to what the other commenters mentioned. It took me a lot of tries to reach the ending because of the O2 meter and the storage device was really easy to miss. Also it seems like you can "overcharge" your O2 tank beyond what the gauge shows you.
Still, I enjoyed the atmosphere, the visuals were pretty nice for a jam game, and it felt like you were having fun making it. I hope you keep honing your skills!