Okay, a number of people are commenting on the hypersensitivity issue, and how its not like their experience.
As far as I can tell, the reason for the loud noises and the awful visuals is to elicit a response from a well...normal person.
(...on a side note, my comment window is growing and growing constantly, without me even touching the enter key and with me being well, way up here. ...okay It seems to have stopped now that its gone halfway down the screen, but that was weird and just plain distracting.)
um, okay, where was I? Oh yes. Normal people. I do use that word because I don't know if its appropriate to be anything other than blunt. The game was meant to bring not autism...but some approximation of the experience of autism to somebody who is not autistic. So, sensory hypersensitivity is just a ham-fisted way to make people who aren't normally shy (let alone to a freaking VIDJA GAME CHARACTER) have to feel repelled and intimidated by what is, usually for them, not standardly intimidating.
So, when somebody on the autism spectrum plays the game, they get something of a double dose. "This is what we had to do to crack a neuro-typical person and make them not want to play with the other children." Its not SUPPOSED to look like real life, because somebody on the spectrum is ALREADY filtering real life through their challenges. The game is trying to be a surrogate frame of reference for the issue, and somebody who already has a frame of reference gets....double framed.