ECHO v0.2.2 (Master Volume added + audio bug fixed)

Update - version 0.2.2

This update is thanks to an audio bug that I found by mistake. This bug would cause an audio file to play randomly at any point in the game.

While fixing this bug, I decided to add a Master Volume control in the start menu, in addition to lowering the initial volume level at the start of the game, as it has been known to be far too loud.

* Fixed audio bug

* Adjusted(lowered) initial game volume at start of game

* Added: Master Volume control