Looks pretty neat, and maybe a simple utility app that looks neat is just the way to go on the App Store.

One thing that caught my eye though was: why are the launch images not filled with the numbers? On a similar note, though--I don't have an idea how to solve that while still using lauch images--the launch image is white, changing themes, killing the app and restarting it hence results in a visible flickr.

That said, I did sometimes have trouble hitting the keys, due to the inactive space in between.