Frank Yu developed gameplay enhancements for the MtStringmore repository, focusing on expanding combat variety and improving player feedback. He implemented new projectile types, including fireballs and snowballs, with configurable firing parameters and updated cannon behavior to support these features. Using C#, Unity, and advanced particle system techniques, Frank created prefabs for projectiles, explosions, and liquids to streamline asset integration and rapid iteration. He also refined player action visuals by adding landing dust and wall-slide particles, refactoring particle systems to use circle-based behavior overrides. This work deepened gameplay, improved visual clarity, and established a foundation for future balance adjustments.