ippa/chingu — pull request #67 by Bobhostern (2014-04-19 18:29:28+00:00)
Title: Update game_state_manager.rb

Made previous_game_state work again!
Added a line to allow things that use previous_game_state to work again.
This is useful for game menus, where you don't want to erase the previous screen, but instead draw over it.