Fixed AudioFlinger issue due to the restart/start buttons being in the
render method. Moved the both of the buttons to the appropriate show
method.
Changed the Map image from png-24 to jpg. Reduced the overall size by
9MB while still maintaining the quality. This fixed the memory issue
that the application was having due to the large image file.
Added a removeAllActors method to remove all actors from the screen and
clear the Arrays of monsters/apples. This allows for a fresh restart
when selecting 'Try Again', rather than just continuing where left off.