It seems the px and py offsets on the update command of the graphics protocol are in normalized device coordinates format in 3D mode (offset of 1.0 = a whole screen), while in some other scale in 2D mode (offset of 1.0 = barely noticeable).

It may very well be that I'm doing something wrong, test code for the demo video here with the single header wrapper for the Ratty Graphics Protocol here.

In the attached video, the flower almost isn't moving in 2D mode because I am targetting the 3D mode scale.