It was indeed working, to an extent, but there were bugs with it. Some areas desired to remain in blackness while there were also rectangular-shaped shades of black. It also took me a moment to understand what I was holding. When I hear aim and shoot, I think GUNS!!!
Since you can't rely on your eyes, this is a game that benefits from allowing reactions to adverse events. It was very frustrating to touch the acid river. I'm suing your river for damages!