After trying out the eliminate: GunRange app for the iPhone 4, I came across one major issue. Every once in a while the video on the gameplay is not visable. After the level's loading screen has completed, the screen goes black but I can still fire my gun and hear it shooting. My only way to fix this is by exiting the app and removing it from the multitask bar. Open the app again and it works for a while but, inevitably fails. Other than this annoying problem, and needing to calibrate after violent movements (very easy to do,) the app is superb. It's actually pretty mind-blowing. Try it out all of you lucky iPhone 4 owners  and let me know if you have the same problems.