Cleaned, Debug, Movement Keys, Player,

-Cleaned up some stray code
-Added a small "Debug" option that appears in the top-left corner when
toggled with "F3"
-Re-integrated movement with the new input system
-Changed some minor Player code.
To-Do:
Player movement is clunky and only one direction at a time, and stops
when shooting. Gotta fix!
Cleaning, Mobs

-Cleaned some more code
-Made mobs spawn, hooray!
To-Do:
-Make bullets kill mobs!
GitHub acting funny, got to give a commit to Sync!