Thank you for the criticism. I'll implement fixes once the jam is over.
The thing about taking damage even though you can't die - that's where the Jam's theme of 'deception' comes in. Ideally, I would never have told the player that they can't die. I just did that as part of submission.
This is what was meant to happen:
You are made to believe that the "armed cannibal gangsters" can kill you. Each time you're shot, you turn red. When you pick up a health, you turn green. "So surely I take damage and can die?"
Knowing that you can't die, you've realised that something is wrong. ie Somebody deceived you into believing that these cannibals can hurt you. If you've been deceived about that, what else have you been deceived about?