A free program for Android, by LonghornGames.

Developed by LonghornGames, Gun Run gives you the opportunity to practice your target-locking skills with a simple game interface of target vs. weapon of choice – each facing the other from the length of a simple ramp.

The weapons range from slingshots and Peter Pan-esque blow guns to full blown missiles – the upgrades available according to your progress or level. The game displays life-sized charts of stats such as Fire Rate, Damage, and Upgrade.

As you level up and upgrade your arsenal, you collect monetary rewards.