Deathplane Demo Update 0.0.3 Release

The Deathplane demo has been updated to version 0.0.3.

PATCH NOTES (Ver 0.0.3)

- Attempted to fix an issue where multiple instances of pause menu controls were showing up.

- Fixed an issue where the left trigger would not lower the deathplane when playing on a PlayStation controller.

- Various minor bugfixes.

- Changed the splash screen.

- Changed the window name.

- Made certain debug content harder to access unintentionally.