I think that's an oversight, but if someone tried to kill me I would defend myself.
I can still make my observation, my point still stand. Also there's a script that make Mrs. Slitherss fire a rainbow laser at you and since 0.0.3 you can hurt her, so I believe in all honesty that was overlooked.
She uses it if you get an answer wrong during the quiz. I think the laser either kills you, or does a massive amount of damage very quickly. Yeah, it would be really cool if she uses that during battle and you have to hide behind some cover as she recharges it.
yeah, your observation is a good one. You can also fly up from the boss room and pop back up on the surface. Though I only did that once in 0.0.3, so I'm not sure if it's still possible.