Well, I died. I had to wait until there were just a couple enemies left on screen so the leech was reduced, but they did just barely have enough damage to kill me.
While I was waiting to die though, I accidentally passed two more levels because the enemies carried me around, and eventually pushed me under the ground where they couldn't hit me, then my orbs took them all out. So I had to move around and try to stay in bounds to get hit.