Added Game States, decoupled game from Window class and placed it in Game < GameState

lib/states/game_state.rb

@@ -0,0 +1,22 @@
+class IMICFPS
+  class GameState
+    include CommonMethods
+
+    def initialize
+      @delta_time = Gosu.milliseconds
+      setup
+    end
+
+    def setup
+    end
+
+    def draw
+    end
+
+    def update
+    end
+
+    def button_up(id)
+    end
+  end
+end