Made possible to toggle the Starry Background on-the-fly!
Added new song for the game (besides the main menu one). Also, pausing and resuming the game doesnt make the music restart anymore
Now game doesnt resume itself - user has to manually press a key to unpause (at least on the play state)
Added a Pause Menu
Fixed bug that didnt made the Pause Menu when window lost focus
Bumped to v0.5.3