Finally, after being grounded for a few days, I've been able to put together a relatively large update featuring my new wonderful Special Forces units (SWAT team-like people who attack both you and zombies) which work pretty well when they are left to battle it out with the zombies. They have two guns, the pistol and machine gun, so watch out! They really pack a punch and can take you out quickly. Lastly, I've finally gotten several level designs from FGS_HURRICANE, so I put together two of them to show you guys (some background graphics to be done, but generally what it's going to look like as a finished product). They are city levels, so you'll find them at the end of the game.
Here are a couple of screenshots featuring the transport vehicle (no, you don't get to drive it, you just get in and it takes you to the next level and you can't return) and a Special Forces member: