Introducing a brand new collaborative chapter titled "Rain World," featuring the following tracks:
1. "Sundown" by James Primate & Lydia Esrig
2. "Bio-Engineering" by James Primate & Lydia Esrig
3. "Threat - Sky Islands" by James Primate & Lydia Esrig
4. "Threat - Superstructure" by James Primate & Lydia Esrig

Additional Enhancements and Issue Fixes:
* Resolved an issue causing crashes during chart loading on iOS versions 13.1 through 13.3.
* Fixed display errors in certain languages.
* Addressed functionality issues with anti-cheat system under specific circumstances.
* Optimized game result interface effects.
* Cover art for song packs now adjusts based on gameplay progress.
* Corrected inaccuracies in Early/Late statistics.
* Fixed an issue where the game would not resume properly when simultaneously clicking on the song list and song illustration to enter a game.
* Rectified errors in the chart animation system under specific conditions.
* Addressed an unexpected combo generation issue in Dogbite CB chart.
* Fixed abnormal backgrounds in result interface under mirror mode.
* Resolved unintended stretching of background images on the launch screen.
* Implemented a new game font to correct glyph errors.
* Fine-tuned sound effects for improved audio experience.