Following the successful launch of Pinball HD for the iPad earlier this year, Gameprom has released a new version optimized for the iPhone 4. Like its iPad counterpart, Pinball HD 4 iPhone combines Gameprom’s Wild West Pinball, The Deep and Jungle Style Pinball into a single game and adds new features including high-resolution graphics for the iPhone 4 Retina Display and new multiplayer capabilities. In Pinball HD 4 iPhone users can challenge…