Skynesia Adventure is a mobile-based gaming application designed to make the learning process more enjoyable and interactive, while also generating revenue for the startup Skynesia. The results of the questionnaire indicate that, on average, potential users prefer educational games that focus on science or STEM subjects, and some users believe that educational games can enhance their knowledge of science or STEM while having fun. This research utilized the game development life cycle theory in the development of the gaming application, and questionnaires were used as a method for designing and testing the application to ensure its usability by users. After the completion of the gaming application design, it went through two phases of testing and evaluation: alpha testing through Unit Testing, and beta testing through the User Experience Questionnaire - Short Version. The results of these tests indicated that Skynesia Adventure achieved a score of 2.29 for both pragmatic and hedonic qualities. Therefore, the Skynesia Adventure gaming application can be considered to provide users with a highly satisfactory user experience. The benefits of Skynesia Adventure include providing a more enjoyable and interactive learning experience by combining gaming elements with scientific or STEM knowledge.