Click to move pet.
Benefits: - Rotation toward arbitrary points. - Change destination and/or speed mid-glide without using "stop" controls nor depending on messages. - Consider depending on messages instead: it's smoother. Drawbacks: - Slight jitter. Waypoints have a slight delay, not usually noticeable but perhaps in slower projects. Had to duplicate costumes for left-/right-facing, because changing rotation-style restores original costume's facing, so otherwise you'd end up with upside-down sprite. Some projects won't need that: symmetrical sprites don't benefit from it, and overhead views don't want it.
