Some demo bugs fixed

Fixed bugs:

• Controllers do not work as intended, only for skipping cutscenes

• Framerate drop when enemies try to run for cover

The controller can now be used to play the game and navigate the main menus.

The framerate no longer tanks to revoltingly low levels when an enemy runs for cover during retries, or multiple runs.

Known bugs:

• An intended speed run route skips a checkpoint

• Restarting in the slaughterhouse may sometimes not give the player the speed mutagen, but the revolver with 6 bullets instead

• Controllers can not operate the pause menu, only show or hide it

• Inventory screen doesn't work

• Objectives screen is nonsense

• Random opening door sound when starting the level

• Enemies turn around too slowly

• End section buzzsaws do not always kill the player

• More animation jank than you can shake a stick at