This Flash Forum "Sharing area" article presents a game in which the user must determine the correct angle and initial velocity for a projectile that must hit a roving target. The mathematics involved is primarily algebra derived from simple calculus concepts, and it is explained in help files included with the applet. 

The Flash source code can be downloaded from the "Sharing Area" of the MathDL Flash Forum.

Open Projectile Motion Simulation  in a new window