Tweaked ui a bit, updated Credits, stubbed load menu, fixed crash when stopping helicopter, Stop order is now only emitted if player has entities selected.

lib/states/menus/pause_menu.rb

@@ -1,14 +1,19 @@
 class IMICRTS
   class PauseMenu < CyberarmEngine::GuiState
     def setup
-      stack(width: 350) do
+      stack(width: IMICRTS::MENU_WIDTH, height: 1.0, padding: IMICRTS::MENU_PADDING) do
+        background [0xff555555, Gosu::Color::GRAY]
+        label "Paused", text_size: 78, margin: 20
+
         button "Resume", width: 1.0 do
           pop_state
         end
+
         button "Settings", width: 1.0 do
           push_state(SettingsMenu)
         end
-        button "Quit", width: 1.0 do
+
+        button "Quit", width: 1.0, margin_top: 20 do
           # TODO: Confirm
 
           previous_state.director.finalize
@@ -25,7 +30,7 @@ class IMICRTS
     def draw
       previous_state&.draw
 
-      # Gosu.flush
+      Gosu.flush
 
       super
     end