In this study, the researcher adopted a HTML5 game engine to develop a cross-platform educational game for learning applications. The developed game could be run on various platforms and several game elements and principles were considered during the design stage. The purpose of the educational game was to help new students to get familiar with the new school, and the learning missions were embedded into a macro-context to simulate a virtual campus for helping students learn and explore the environment, policies, and routines of the school. After the complete development of the game, a group of students were invited to use and test the game, and their feedback were collected through questionnaires. The structure and learning missions of the developed educational game, and the pilot evaluation resulted were reported in the paper.