Splash Screen, Game Over, Leaderboard (see comments)

At this stage of the game, the design/layout is complete for the splash screen, game over screen, and the leaderboard screen.  I am having some issues, and have hit a real wall:

-I can't get the scene to change properly from main to Game Over (I have only done testing when ammo runs out, and the scene switch does not happen correctly - you can observe by playing the game)

-I have no idea how to get the enemies killed scored sent over to the leaderboard, every time I try to it messes with the rest of the leaderboard and none of the data gets transferred over (right now a static number is assigned to score in Scoreboard.py)

-Didn't implement the count up timer yet, because I was unsure of how to tie it to the score...as in would a longer period of time take away points, etc.