because one is so involved with the experience and can affect on the system'When one do things in the game, one is so involved in doing ... we really were ... gaming is so much more interactive than lectures that include only one channel ... in the game you can see cause and consequence chains more clearly'. Previous statements reveal why computer games can be effective and captivated. However, the development of such games that help players to understand cause and consequence chains is really hard. One big question is, what kind of game elements can be used to facilitate reflective thinking?