Adding to this, synesthesia is definitely not a mental illness. It would depend on exactly what sort it is, but as far as I am aware it is only very rarely even an inconvenience – Wikipedia describes it as a "neurological phenomenon", which seems about right.autism isn't considered a mental illness
Yep. "Mental illness" isn't what I really wanted to say, but I couldn't figure out any other way to explain the jist of my idea in a way that'd fit into the title of this post. Without labels, I'd want this game to be a way to experience the world through the eyes of people whose brains work differently, including color blindness, synesthesia, CAPD, menopause, etc. And maybe branch out to people with dementia, cerebral palsy, people in wheelchairs, and so forth. Just a matter of finding the right linguistic approach.