In the context of the digital era, video games, as an emerging form of entertainment, have become the focus of research in terms of their design and optimization of user experience. This study focuses on the application of digital music in games and its impact on player experience, aiming to reveal how music elements deepen the immersion and emotional resonance of games. According to the analysis, digital music significantly enhances game immersion and players' emotional engagement through dynamic music systems, close integration with game narratives, and innovative applications in virtual reality (VR) and augmented reality (AR) games. In particular, games such as Traveler provide players with a unique empathic experience and deep emotional impact through well-designed music and sound interactions, demonstrating the central role of music in enhancing game narratives and building game worlds. However, the study also points out the technical, subjective, and culturally sensitive limitations of digital music in game design, challenges that need to be faced and overcome by future game developers and music creators alike.