This is a game from the Discovery Channel website of all places, in support of it's show Future Weapons. The game is centered around firing a NLOS (Non Line Of Sight) Cannon at targets a substantial distance away. Your task is to adjust the needed velocity and elevation to score points. A novice will get the hang of it fairly quickly, yet the difficulty increases with each level.
http://dsc.discovery.com/tv/future-w...on/cannon.html