Updated Game V1.2 - Final Polish

Here's the final build used at the UW Stout Game Expo, Winter 2017. Updated the game to include f11 as a fullscreen button,
main menu works with mouse now, and removed the confusing Enter key from the tutorial level

 (also found that one insta-kill spike that didn't care about HP and fixed it)

- Brendan (1StupidRat)