Fixes bug where movingBox wasn't removed on state button press
Mood now changes randomly, though with a downward trend
Combines two click functions into one, tweeks clickabilty balance

Integrated mapMoodToClick(), which just did one thing, into
isClickable(), which was the only function to use
mapMoodToClick() so far.
Messed with the balance of the numbers used in isClickable(),
so also rearranged values created so that they'll be more easily
editable in the future.
Corrects typo in index that made tests.js inaccessible
Begins what I think may be structure of unit tests

Begins with mapToRange tests
First attempts at controling slowMouse speed via distance