Thank you so much for playing! I'm glad you enjoyed what you could, and I know the difficulty is a little whack.
The "lungs" are a breathing mechanic, every second or so they will flash yellow and there will be an "R" in the corner to indicate that you must take in a breath with the R key, because you are slowly losing oxygen.
I wish I had added little popup menus to describe the mechanics, but oh well.
Glad to hear you enjoyed the core of the game! Sadly music couldn't be made fast enough.