Read the description of the app! – Corners Review

The description states what this app does very clearly. In case you're unsure, there's a block that bounces off the edges of the screen and occasionally it hits a corner. That's it. There's no competitive Game Center leader boards or anything like that. It's basically a cool screen saver. The point? There is no point unless you count getting a whole bunch of corner hits (which can't be controlled except for the speed of the block) as a point. It would be nice if there were more backgrounds to choose from, or the ability to use our own pictures though.
Review by TheFuriousFish on Corners.