After playing again I have a bit more feedback, the health bar feels really, really unnecessary, since the only reason I'm dying is by the one-two combo of being hit by something and then the hand slapping me. I (personally) would change the back wall to do damage instead and push the player back forwards, and get rid of healing upon new level. In my opinion that would feel more fair but I'd experiment with it.
Also I have gained a new hatred of birds, and I will be seeing low flying birds combined with traffic cones in my nightmares.