-Added ambient sound for each biome.

-Music now plays randomly on a regular basis, the music volume slider still works in the game settings.

-By standard, now the volume of the music is very small (if you don't like it, just turn it to zero).

-Improved the sound of the robot flying over water.

-Reduced the volume of the steps of the protagonist.

-Some visual effects have been applied to the player's drone.