Freezes when counter = 0 and message displays. Read extended description.

Okay, so if counter is equal to zero, NOTHING WORKS. Everyting freezes.
ALSO, if counter is equal to zero, it should display a message that
tells you how much you SUCK.

Please take notice: BEFORE I ADDED OR TOUCHED ANYTHING: the cannon would
NOT fire. So I didn't really have a way of checking to make sure it
worked. Again: the cannon would NOT fire BEFORE I touched/modified
anything.
Move game_over out of keyPressed.