## 4 Discussion  
This study focused on aging-friendly game products and established a systematic design framework based on online review data mining. It aimed to address key challenges in the current design of game products for elderly users, such as the superficial identification of user needs, lack of targeted design solutions, and high subjectivity of evaluation processes. The results demonstrated that BTM topic modeling based on online reviews effectively extracted the core needs of elderly users, which primarily fell into five categories: simplicity and convenience, leisure and entertainment, cognitive training methods and effects, comfort and safety, and product appearance. These needs are largely driven by age-related cognitive and physical changes as well as the desire to enhance quality of life and self-confidence [35]. Previous research has shown that Chinese elderly users generally prioritize ease of use and practicality in aging-friendly products, particularly regarding oper  
Figure 14: Product description diagram and gameplay flowchart. ational convenience and functional utility [36], which aligns with the findings of this study. In traditional demand mining methods for aging-friendly designs, sources of user demand are primarily drawn from behavioral observations, user interviews, and questionnaire surveys [37]. These approaches often rely on assumed needs or expert evaluations and lack feedback derived from users' long-term, real-world product experiences [38; 39]. Therefore, this study leveraged actual consumer behavior as a key source of user demand and performed BTM topic modeling based on online shopping review texts from e-commerce platforms [40]. This approach enhances the authenticity of the data and the representativeness of user concerns, thereby providing a more accurate foundation for product design. It effectively captures user feedback and potential expectations regarding the gaming product experience, thereby addressing the limitations and one-sidedness of previous studies. Second, the identified user needs were prioritized using AHP. The results showed that \"simplicity and convenience\" received the highest weight, indicating that operational burden remains the primary factor affecting product acceptance. This aligns with existing research, which highlights operational difficulty as a major barrier to user engagement [41]. Research has shown that in product design and development, priority should be given to reducing process complexity, streamlining operational steps, and simplifying information presentation to fulfill users' preferences for a clear and straightforward experience [42]. Strategies such as \"minimizing cognitive load\" have been proposed to enhance task efficiency and product intuitiveness [43]. These findings highlight that \"simplicity and ease of use\" not only play a crucial role in user evaluation but also serve as a clear foundation for design decisions regarding function selection, structural layout, and interaction methods. This approach is particularly effective in reducing cognitive burden and operational barriers in aging-related products. Therefore, the results of this study provide direct and meaningful practical value for promoting usability-oriented design and development of products for the aging population. The second-highest priority was \"leisure and entertainment\", which ranked above \"cognitive training methods and effects\". This suggests that elderly users value the emotional and life-enhancing roles of game products, reflecting their growing importance in promoting mental health and well-being. This finding is consistent with previous studies showing that older adults are increasingly willing to engage in gaming to stimulate positive emotions and improve their mental health [44]. To meet the need for \"leisure and entertainment\", aging-related product design can enhance user engagement by incorporating relaxing elements and playful features.