Against the backdrop of rapid urbanization, the issue of neglected green spaces in aging communities has become increasingly prominent, with traditional top-down governance approaches failing to sustain resident engagement. Using the Tielu Third Village community in Chongqing as a case study, this research designed and implemented a gamified platform interface incorporating map visualization, task systems, and a points-based reward mechanism. Through qualitative research methods, combining user behavior data and in-depth interviews, the study analyzes the platform’s impact on resident behavior and community residual green spaces. The results demonstrate that gamification mechanisms significantly enhanced residents’ motivation to participate, shifting their engagement from initial curiosity to ongoing and proactive task execution, and fostering a sense of emotional attachment and responsibility toward community green spaces. In addition, the platform’s social interaction features effectively built stable neighborly collaboration, thereby strengthening community cohesion. The study also found that an age-friendly interface design with large font sizes and simplified operations improved user satisfaction among older adults. Overall, the research shows that gamification strategies provide a digital, low-intervention, and sustainable pathway for community micro-regeneration, with important application value in activating spontaneous resident participation, optimizing community ecological environments, and reshaping neighborhood interactions.