Added levels 2-5. Added a LinkedList to handle text within while loops displayed in the game to change as drop-down buttons change. Also fixed the error of if there is no text to display, an out of bounds exception would be thrown since it is trying to display the text LinkedList when there is none. Levels 1 and 2 are as complete as possible. They just need the reset button. Otherwise, still need work on levels 3-5 for setting up text and buttons. Levels 1 and 2 are commented out in the LevelHandler to work on Level3.