I ran out of space in the game options menu, so I added another page for the Graphics settings. Why I ran out of space?
Because of the new LCD filter!
The filter displays faint black horizontal lines between pixels and also (very) faint RGB squares, one per pixel. It's a subtle effect but it emulates the feel of a handheld screen. Since we scale the view up, we can actually draw between the game's pixels. So these aren't scanlines in the traditional sense, more like the borders of the liquid crystals the Error Boy Adventure's display is made of.
Whatever, I think it looks neat. If you like your graphics clean, just turn it off!