HotFix: fix main to work as a module

Forgot to fix main, fixed. So now game can be launched as a module

main/__main__.py

 import pygame as pg
-from __init__ import Game
+from . import Game
 
 if __name__ == "__main__":
     pg.init()
     pg.mixer.init()
     Game().main_loop()
-    pg.quit()
\ No newline at end of file
+    pg.quit()