02/21 Update

Change the speed and attack power of Machina depending on the difficulty level.
Tweaked player stamina
Adjusted class changeover time.
Fixed a problem with append disks turning into different items when picked up again.
Fixed a typo in the mission text.
Fixed a typo in the ending.
The cursor disappears when the E button is pressed in the inventory while fast-traveling.
Fixed freeze when Machina appears from a hidden place.
Changed the color of some NPCs' clothes.
Fixed volume of some sound effects.