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Added automatic opening of the pause screen if the application is no longer active.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.
The countdown bar warning zone is now a percentage of the bar instead of a set zone. Also the time lights spawn, refresh for now decreases as the player levels up.