It was amazing man, and as I said before it's a great idea. It would be incredible if you make the game a bit extense. You are very talented. I struggle to make simple games, but you inspired me to don't give up.
What a game! That's a very nice idea, there are some bugs related to the physics (sometimes, the enemies don't disappear when you are in Oxygen Tank, but I just had to jump, and then, it was solved. 10/10