Professional certification has become one of the important criteria for people to apply job positions in industries. Recently, computer-based learning has been widely adopted for helping students prepare for various professional certifications. However, most of the computerbased learning materials are not attractive to students, such that their learning performance is significantly affected owing to the lack of learning interests. Researchers have presented that joyful game-based learning can

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... crease learner's motive and pleasure. Therefore, this study builds a certification tutorial system containing two different modules that are the traditional e-version and the joyful game-based version. Moreover, an experiment has been conducted to explore the participants' engagement and learning effectiveness of the proposed approach. Some terms are explained that the "prior knowledge" is represented by the "pre-test," and the "level of effort" (equivalent to the "engagement") is represented by the "experience" which is the cumulative number of correct answers. The result indicates that the traditional e-version may be slightly helpful for those participants with higher/middle prior knowledge and level of effort, and the joyful game-based version may be more helpful for those participants with lower prior knowledge and level of effort.