This game makes me go YES! terrifying
Your WebGL build lags a little bit with all the post-processing effects -- make sure to keep optimization for your platform in mind when you build for the web.
So far as the aesthetics of the game are concerned, I can't help but wonder if having doors on the side of the walls marked "DETENTION" might not be a bit less...politically charged...than putting children in cages. No game exists in a vacuum, after all; it is delusional to pretend otherwise.
A couple conveyance things: I wasn't sure what the green bar on the left-hand side of the screen was (my health? the structural integrity of the building?). Also, do the children's health bars mean they can die, cause that's a whooooooole can of worms right there buckaroo -- make sure you know what you're doing before you lie in it.
You've made an excellent lite horror game though. I was desperate and terrified the whole time I played.