Yeah, this is serious issue. When playing in browser even on 60 fps, camera moving jerky, this is old stencyl bug, i reported about it many times, but it is not changing.
Anyway, I applied smooth camera and smooth motion behaviors, so it got to became smoother.
Also, probably, I need to make platforms graphics less sharp. When objects is sharp jerky motion is very noticeable.
The game was updated, please check it.