diff --git a/app.js b/app.js
index 63098d6..e9373ef 100644
--- a/app.js
+++ b/app.js
@@ -145,18 +145,23 @@ let game = {
     },
 
     fullscreen: function() {
-        if (!document.fullscreenElement) {
-            document.body.requestFullscreen();
-            menu.settings.fullscreenButton.name("Quitter le plein écran");
-        } else {
+        if (document.fullscreenElement) {
             if (document.exitFullscreen) {
                 document.exitFullscreen();
-                menu.settings.fullscreenButton.name("Plein écran");
             }
+        } else {
+            document.body.requestFullscreen();
         }
     }
 }
 
+document.onfullscreenchange = function() {
+    if (document.fullscreenElement) {
+        menu.settings.fullscreenButton.name("Quitter le plein écran");
+    } else {
+        menu.settings.fullscreenButton.name("Plein écran");
+    }
+}
 
 function playSound(sound, note=0) {
     sound.stop()
diff --git a/jsm/Menu.js b/jsm/Menu.js
index efd7937..041e556 100644
--- a/jsm/Menu.js
+++ b/jsm/Menu.js
@@ -149,7 +149,6 @@ export class Menu extends GUI {
         
             let vortex = dev.addFolder("vortex opacity").close()
             vortex.add(scene.vortex.transparentCylinder.material, "opacity").name("dark").min(0).max(1).listen()
-            vortex.add(scene.vortex.opaqueCylinder.material, "opacity").name("opaque").min(0).max(1).listen()
 
             changeMaterial(scene.minoes.material.constructor.name)