Add a background music

[ekinkaradag]

Is your feature request related to a problem? Please describe.
It would have been really nice if a background music was available while playing the game.

Describe the solution you'd like

• Add a background music
  • It should start playing when the page loads
    • It cannot be done. Because you would get an error like this: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page.
  • There should be mute button on the page, in case the player doesn't want to hear the music.

[ekinkaradag]

Tthe solution is updated.