Fixed - Bug where customers won't recognize empty shelf slots and just stay around their spaceship
New - Menu music
New - In game music
New - Sounds: Checkout, Mushroom Seed, Pickaxe, Snail Meat Raw, Harvesting a boulder, Footsteps of characters (not yours yet)
Changed - Tweaked faces
Changed - Mushroom seed respawn time from 10s to 120s
