12/1 patch 2

added sound effects for interface buttons and clicks

• attribution: https://obsydianx.itch.io/interface-sfx-pack-1

added background ambient tracks

• attribution: https://colossalwreck.itch.io/ambient-sound-track

added volume control slider in the options

• note: volume control slider doesn't control "Radiowave"

• keep volume control to low/off if you usually open "Radiowave"

fixed an issue where Quit button doesn't quit the game