RunningPixel has an Xbox Live Indie Game called The No button Game that they’ve made public is coming to Windows Phone 7. Wait, no buttons? Well check out the video. I have to say, I love the concept. Of course, on a mobile device using an accelerometer is a bit more common but still, when you take a game designed for play without buttons and move it to a platform without buttons it’ll probably be an easy port;)
Check this sample out from the XBLIG version and note that this has already been tested on a real WP7 device.
My presumption is that again, the screen taps are not going to count but you’ll likely tap the screen to cause an accelerometer event which is the trigger. I like it. Very novel game play and I think that goes a long way.