You unlock this door with the key of imagination. Beyond it is another dimension - a dimension of sound, a dimension of sight, a dimension of mind. You're moving into a land of both shadow and substance, of things and ideas. You've just crossed over into the TouchArcade Zone.
Well done! I had a go at it myself in the app's description: You're traveling through another dimension on your iPhone, a dimension not only of sight and sound but of touch. A journey into a wondrous digital land whose boundaries are that of imagination and battery life. That's the signpost up ahead - your next stop, the Flylight Zone!
