diff --git a/singleSkinMode.bmp b/singleSkinMode.bmp
new file mode 100644
index 0000000..473a0be
Binary files /dev/null and b/singleSkinMode.bmp differ
diff --git a/singleSkinModeClicked.bmp b/singleSkinModeClicked.bmp
new file mode 100644
index 0000000..75178db
Binary files /dev/null and b/singleSkinModeClicked.bmp differ
diff --git a/viewer.hpp b/viewer.hpp
index 6bdb6a9..ae646ea 100644
--- a/viewer.hpp
+++ b/viewer.hpp
@@ -5,13 +5,16 @@
 #include <gtkmm.h>
 #include <gtkglmm.h>
 #include "game.hpp"
-#include "SoundManager.hpp"
 #include <map>
 #include <vector>
 #include "particle.hpp"
 #include <GL/glu.h>
 //#define ENABLE_SOUND 1
 
+#ifdef ENABLE_SOUND
+	#include "SoundManager.hpp"
+#endif
+
 // The "main" OpenGL widget
 class Viewer : public Gtk::GL::DrawingArea {
 public: