Cannon is a 2D trajectory simulation/game. The basic objective is to adjust your angle and power in order to hit a target.

Version 2 recreates Cannon from the ground up using the AndEngine open source 2D game engine.

As of 2014-03-15, Cannon is now open source under the Apache License!
https://github.com/pilot51/cannon

The touch screen controls use pressure sensitivity that will likely need adjusted for your device. It is in the Scale preferences screen. Move your finger with a soft touch to adjust angle and power, press harder to fire.

Too slow/boring? Increase the speed multiplier, also in Scale preferences.

Random Targets: Targets are placed randomly on the screen and you try to hit them to gain points. With both Collision and Keep Targets options enabled, as is the default, it becomes a real challenge as old targets become obstacles.

Custom: Create your own target via screen coordinates and change a variety of variables to try hitting it.

Permissions:
Internet & read phone state are required by ads.
Prevent phone from sleeping is requested by AndEngine.

Full change log and other details at http://cannon.pilot51.com.
The issue tracker, which can also be used for suggestions, is at http://tracker.pilot51.com. Though it should be noted that Cannon has been mothballed due to too many negative/unconstructive comments and most of my other apps doing much better and consuming my time.

Recent changes:
New features:
-Realistic bounce collision physics
-Full in-game control with D-pad/trackball or touchscreen
-Overlay of angle, velocity, current and high scores
-Change projectile size in Custom game

New options:
-Classic Mode (if you want to see what v1 was like)
-Game speed
-Keep old targets on screen
-Physical screen borders
-Machine gun mode
-Explosive targets!

And much more... (see website for entire change log)