Added Background and Foot Step Audio

Found audio files for background and implemented
audio pretty well.
Also implemented a toggleAudio() function to turn off
all currently playing audio.
The foot step audio works but is ineffective when player is
running, will have to find a sound file just for running and walking
and distinguish between the two in game.
Finishing Touches

- removed rope class from rops.js
- removed some minor comments, code and footstep sound
- updated information on introToast
- added styles to option buttons
- added found more sounds for the game but did not implement them