Added Enemy Animation, New Weapons and Fullscreen Mode

Just like the title says, enemies are now animated! Probably looks wayyy better now :P

Next, I made a few different weapons  that drop with the weapon boxes. The weapons voxes look like a box... with a "?" in the middle. Pretty basic... Anyways there is a rifle, which fires single bullets at a high rate, as well as a shotgun which fires spread shots at a lower rate.

ALSO, you can now enter fullscreen mode by pressing the ENTER key!