Our star war game is now on YouTube! Watch it on YouTube using the link http://youtu.be/82vLRGrsBYw .This program demonstrates the principle of projectile, a typical physics problem. At a certain angle and a certain launch velocity, the projectile can reach a certain taret. The maximum range is at an angle of 45 degree. This principle can be applied in the military field where a missile needs to be launched at a certain velocity and angle in order to hit a remote target. It can also be applied in other scientific and technological fields. This game provides a good training for students in their abilities in making estimation. You can view the code at: