2024/04/28 0.8.09 Version Small Update

- The fifth difficulty "Ascended Reaper" can be tried out as an experiment purpose. Not all changes are adapted to this difficulty yet, so the scoring won't be saved.
- Some difficulty descriptions are changed.
- Revamped the boss in 4-S.
- Zoomed out the boss camera more in 3-3.
- Added the VSync Option in the graphics setting.