Presentation's pretty good, and the concept's pretty great. Everyone asking for help and you saying no is also pretty funny. Oxygen mechanic's pretty interesting, too.
My biggest issue though is that there's no checkpoints. It's really annoying to have to go back to the very start when you die on a later level. This isn't helped by the enemies doing a lot of damage.
Still, the game's pretty good, it just needs some polish.