As a critical skill in STEM education, spatial ability of students needs more attention of educators to focus on its development. In this regard, games are found to have the potential to be used as an effective training tool of spatial ability. The effectiveness of virtual reality games compared to traditional video games in enhancing spatial recognition abilities is explored in this dissertation project, and a serious game was developed for both PC and VR platforms, applying features and elements designed to stimulate spatial thinking. By means of survey, gameplay, and ability quiz, the performance of 8 postgraduate students was analysed to assess their changes in spatial abilities before and after playing the two versions of the game. It was found from the results that the VR platform showed a slightly better training effect since the participants were tested to have better grades in the ability quiz. However, further research with larger sample capacity is necessary to obtain a more generalised conclusion. To validate these findings and refine the methodology, reducing the difficulty gap between the quizzes and exploring more effective questions for evaluation may also be considered.