The Salamander people use a gun to change the orbital movement of the Earth. However, Earth's self-rotation, not orbiting, weakly changes the gravity. Even then, all the objects would feel the force, not just few small items (that could be lifted on a rope).
In the opening scene on the Emerald Planet, the ringed planet in the background sways back and forth on its support cables.
In "fight scenes" punches and kicks do not reach targets
In most shots of Starman flying ropes/harnesses are clearly visible.