iPhone game development firm Geppetto has released iNinja, its latest game for the iPhone and iPod touch. Created by former Square Enix programmer Yoshiyuki Miyagawa, iNinja is a shooting game in which players attempt to hit enemy ninja by using a flicking motion to throw shuriken (throwing stars). The game features an air hockey-inspired two-player versus mode, various one-hit-kill traps, the ability to hold down on the screen to charge the shuriken,…