v0.50 is released~

Kat now has a little story scenario and is probably the most complex in terms of branching dialog options.

When you meet Kat, you can ask if she's a human or kitty, and offer her water, berries, or fish!

Successfully doing so will prompt a unique dialog when you meet her later in the Home Island. She'll also join you on your current run. This is a unique scenario that will only occur once.

New screens have also been added when you beat levels for the first time.

Changelog:

• - Add Kat Island
• - Add new 'Difficulty Unlocked' screen
• - Add new 'Level Unlocked' screen
• - Add portal colours
• - Change environment when selecting levels
• - Fix wrong popup shown when resetting research
• - Fix settler attached to ghost building
• - Fix settler not moving when building moved
• - Fix settler not unassigned from destroyed building
• - Fix cannot move building at storm position