Your game demonstrates simplicity and ease of interaction, which is a great fit with the usability principles of UX. The straightforward design makes it easy for players to understand and navigate the environment. And the colors stand out. Overall, your game provides a solid foundation and there is still room for improvement in maintaining consistency to provide a smoother user experience. In addition, because the keys are located at the edge of the screen, it is also difficult to find the key points of the screen, resulting in a poor user experience. Keep up the good work!