The scale at which the time is passing. This can be used for slow motion effects.
timeScale is 1.0 the time is passing as fast as realtime.
timeScale is 0.5 the time is passing 2x slower than realtime.
timeScale is set to zero the game is basically paused if all your functions are
frame rate independent.
Except for realtimeSinceStartup,
timeScale affects all the time and delta time measuring variables of the Time class.
If you lower
timeScale it is recommended to also lower Time.fixedDeltaTime by the same amount.
FixedUpdate functions will not be called when
timeScale is set to zero.