yeah, that's the Unity build and it is messed up in a different way :)
Regarding the jittering, I think it's because of the way I'm handling velocities of things bumping into each other -- the position is most definitely rounded to full game pixels, because otherwise the pixels would be hideous! but I'm not sure how to handle the case where pushing against something flickers you back and forth across the boundary.
In this HTML5 Godot build there's none of that weird subpixel rendering trash like in the Unity build, is there?