Improvements

-Added a better background in shop
-Added a better background in treasure
-Added a better background in main menu
-Added a better background in character select
-Improved character select menu
-You can now unlock perks while leveling up
-Added animation when unlocking perks after leveling up
-P1 no longer shows up on top of player if you are the only player
-P1 no longer shows in UI if you are the only player