i wonder if it has something to do with the framerate! i use a delta time, so if it is running into issues running smoothly, the movement will end up very jumpy. i'll have to think about what the right way to solve this is :)
also, i think a v0.0.0.0.0.2 will include momentum / some basic physics and as a result, interpolation! perhaps that would help.
anyway, thanks for trying it out!!