Added a second difficulty increase by having the max cooldown increase for each level.
Changed the config so that the bar goes down quicker on the lower levels.
Changes to how the difficulty increases based on the level.
Added automatic opening of the pause screen if the application is no longer active.
Added the ability to continue the game from the menu screen.
Added score and changed method of leveling up to be based on score instead of time.
Menus extended, Game Center leaderboards added and the beginnings of sound.
Music no longer used removed.