Added ColorBlind Mode and various bug fixes

Released v1.0.2, see Release note here: https://github.com/markod0925/LetterCatcher/releases/tag/v1.0.2

- Refactor tween creation for enemy and letter scenes; adjust audio player volumes

- Bugfixes

- Add color blindness correction feature and related UI elements

- Reset story list on difficulty selection, adjust enemy speed for hard mode, and add timers for game win and game over transitions