Added the first media tile for display on Github.
Added back in backwards movement. This will be disabled when the game is released, but until then it's back in because it makes debugging and testing easier.
Added new missiles (vanguards) with textures. These aren't finished yet, and should be revisited.
Updated to now feature a 'fireRocket()' function.

I've also removed a lot of the particle effects (for now) because they're getting in the way of debugging.

The file needs to be *totally* cleaned up and restructured, but for now, it's all in one place which is making development easier.