The emergence of computer educational games in learning has a great impact mainly for adolescents. Educational games can be used to teach sensitive issue such as health well-being. In particular, many works point out the success of games in improving someone's knowledge in the medical field. This paper describes an educational game “Healthy Kidney” which aims to raise people's awareness about the prevention against chronic kidney disease. The developed educational game is validated by a classroom experiment in which 41 students from different educational levels were involved. Students were divided into two experiment groups who played two different versions of the game and one control group which underwent a traditional method of learning. Results show that students are more satisfied with the game and enjoy using it than learning by traditional methods.