Merge pull request #16 from himedlooff/master

Removes old level screen.
Adds sound for ooze drop.
Adds sfx for buster hits.
added death oozes
random size and speed of oozes. decreased chance that they spawn.
Adds sfx for ghost death.
added blue powerup (shield)
merge fix
Merge.
Fixes sound issues.
Adds note about what kinds of audio files to use.