v1.2.3 - "Behind the scenes" update a.k.a. The update where I actually add cool and interesting things instead of stupid garbage

- Added more donors.

- You can now use the scroll wheel to navigate the music player menu.

- Added drop-down categories to the music player menu. Now, music introduced in each respective chapter is hidden until the menu section is expanded. This is due to potential spoilers in the music titles, especially in future versions.

- Added a "Behind the scenes" page in the extras menu. This page is for cut content, trivia, and behind-the-scenes info that may be interesting for you to know. The menu is similar to the music player menu, with drop-down categories for the same reason.

- A notification now pops up at the top left of the screen when you cross a formerly-invisible checkpoint during a trial segment.