One of the few games in the App Store already taking advantage of the iPhone 4’s gyroscope is Eliminate: Gun Range from ngmoco.
It’s a very simple gun range game, where you pick off various targets with an increasing array of firepower at your disposal. Aiming the gun is done by tilting the handset and physically moving it around you to look to either side; it’s really impressive. You don’t have to faff about with any complicated swiping and this keeps your screen fully visible at all times too; you simply tap anywhere to shoot.
It’s very accurate; even the slightest movement registers onscreen. The action is very smooth and the brilliant display on the handset makes even the fairly simple graphics quite striking.
It’s very basic, so there’s not much more to say about it. We’re sure that app developers are beavering away day and night to get the most out of the iPhone 4’s gyroscope now that the hardware is available. But as a first example of the gyroscope’s abilities, Eliminate: Gun Range is worth a go.