Third Prototype.

This is pretty much the finished game. Fine tuned collisions are the
most major recent change - you will now need to add 'hitbox' movieclips
into every object, covering everything that should be possible to
collide with. Also created a proof-of-concept animated object. Works
perfectly, although you will need to be careful giving it hitboxes -
they will stay stationary through the animation, although individual
frames can be given their own hitboxes as well.