TIME bugfix

I have implemented a system that can count the total gameplay time. But it was not very accurate. Now the count is pretty much accurate.

I still need to do more tests, so if you find any bug about gameplay's total time, please tell me. (You can see it at new games/load game menu screen at game's title screen)

Also, this game is still in development. Despite I already fixed many bugs, you still can find other bugs.