Added Mouse handling to MenuScreen and Loading Screen

HoneycombRush/ScreenManager/MenuScreen.cs

@@ -109,7 +109,8 @@ namespace HoneycombRush
                     selectedEntry = 0;
             }
             else if (input.IsNewKeyPress(Keys.Enter, ControllingPlayer, out player) ||
-                input.IsNewKeyPress(Keys.Space, ControllingPlayer, out player))
+                input.IsNewKeyPress(Keys.Space, ControllingPlayer, out player) ||
+			    input.IsNewMouseClick(InputState.MouseButton.Left, ControllingPlayer, out player) )
             {
                 OnSelectEntry(selectedEntry, player);
             }

HoneycombRush/Screens/LoadingAndInstructionScreen.cs

@@ -94,7 +94,8 @@ namespace HoneycombRush
                     ScreenManager.AddScreen(new MainMenuScreen(), PlayerIndex.One);
                 }
                 else if (input.IsNewKeyPress(Keys.Enter, ControllingPlayer, out player) ||
-                    input.IsNewKeyPress(Keys.Space, ControllingPlayer, out player))
+				         input.IsNewKeyPress(Keys.Space, ControllingPlayer, out player) ||
+				         input.IsNewMouseClick(InputState.MouseButton.Left, ControllingPlayer, out player))
                 {
                     LoadResources();
                 }