minor update LD

LD50 isn't (as of writing) finished yet...

* Added a very simple intro screen. This will be updated.

* Turned a track into an .Ogg from a Wave to save space.

Character now dies when HP hits 0, however the Hud doesn't read the changes in HP yet. This will be the next thing I plan to fix. I think I have to make a emitter for it?

I also need to make a pause menu and a game over screen. After those basics, then we can add some fun things.