Maybe it's from watching too much Star Wars, but "solar sailor" brings to mind an old-fashioned, harmless spaceship, not a bounty-hunter like hunter. Maybe it's just me, but a more threatening job title would make uttering of the name into a "cool" moment instead of a let-down after the action.

The idea is pretty neat, a machine using human agents to indirectly accomplish what it cannot. Good thinking!

One little pet peeve I had was the voice didn't match the face. The face is obviously female, while the voice is a male voice. That created a dissonance that disconnected me throughout the film. 

Still, the brick-built effects, especially that cloud at the end, looked great.