Timer Added

We added a timer to the game, how has can you beat the game? 

How it works:

1. It doesn't count the time when words are clearing. 
2. It stops time and is displayed when the game is paused.
3. The game now pauses when you click away (this also prevents cheating which could have been done before)
4. There's now play time records:
   a. Fastest Clear Letters for each difficulty
   b.  Longest Lasting in Endlesss Mode for each difficulty
   c. Fastest to 1 Million Points on Endless Mode for each difficulty
5. Fastest to 1 Million Points on Zen Mode for each difficulty