Framerate's hard to determine from a youtube video of someone pointing a camera at it, single-stepping has some things seeming to move at the same framerate as the camera but redrawing the whole screen as the player moves around looks more like 1/3 of the camera's framerate to me.
It looks to be at worst 10fps to my eyes. Which is also where animation really starts to shift from “moving drawings” to “fast slideshow” in my experience. So right on the border.
