Much Needed Polish!

-Tons of new sprites to make the game look more polished!
-Made the splash screen look more alive.
-Leaderboard got a huge makeover. Global and Friends leaderboards.
-Medals for the top 3 players on the leaderboards!
-Avatar moves when you get combos and talks!
-Game Over Scene got a little bit more love.
-Shop also got some love.