UPDATE: GLOWING GUN BARREL AND FOOTSTEP SOUNDS!!!

-M16 Rifle barrel will now smoke and glow progressively redder as you fire, and it cools back down :)
-player now has the first rudimentary footsteps! Currently the sounds aren't on a per-surface basis, having issues with that at the moment... BUT this also means I added footsteps to the enemies so now you can actually hear them coming!!!