Version 0.3.1 Update

Bugfixes:

- Catching now takes the player out of the battling scene

- Using an item now doesn't take forever to load

- Improved the colouring in the advantage chart

- The satchel now disappears when it's supposed to

- The menu and fight buttons in the battle scene now deselect if the player is using a mouse, and reselect if they aren't.