- make user's interaction with the interface affect visuals and narrative
- pointer turns towards direction of motion (trig...atan2) (see "rotate towards a point" sample at the code depot)
- thrust animation fades in with motion, fades out with stasis
- on mouseMove, note the current time
- on enterFrame, subtract 3% alpha, but when mouse has moved recently, also add 5% alpha
- mouseMove event fires less often when player is busy animating or calculating.
- changed to enterFrame event so that the thrust always turns on when mouse is moving.