Fixed all sorts of stuff with the leaderboards and idea for a new mode.

I found a bunch of bugs with the leaderboards after I released the game. You should now be able to change your name in the top right of the main menu, and it will appear properly in leaderboards especially the Arcade mode and Level 1 were messed up before. Arcade mode leaderboards reset weekly. I am thinking of adding a new mode where there is a limited amount of balls and everyone gets the same spawns.