bang! bang! was an artillery game for Windows 3.1, 1990 made by David B. Lutton II.
"Bang! Bang! is a simple artillery game. The landscape is randomly generated and usually, but not always, creates a hill between the two opponents. You define angle and velocity of your shot, wind speed is displayed and taken into calculation. Bang! Bang! has none of the fancy add-ons Ballerburg sports, it is pure ballistics, and it's either hit or miss: the first successful shot will destroy your opponent's cannon and end the game." (source: http://members.chello.at/theodor.lauppert/games/bangbang.htm)