Powers Update pt. 2

this is a part 2 to the powers update released in June, this update focuses on adding a power unlock system, to improve play time length, and add play progression to the game. it also includes minor bug fixes to the game.

in this update
-new menu interface for unlocking new powers
-new unlock power system in the game for improved play time
-the score now keeps track throughout all maps and is used as currency to unlock new powers
-minor bug fixes