diff --git a/main-gdxapp/src/main/love/distributedrebirth/gdxapp/GDXAppMain.java b/main-gdxapp/src/main/love/distributedrebirth/gdxapp/GDXAppMain.java
index 73b2d231..e21f98a0 100644
--- a/main-gdxapp/src/main/love/distributedrebirth/gdxapp/GDXAppMain.java
+++ b/main-gdxapp/src/main/love/distributedrebirth/gdxapp/GDXAppMain.java
@@ -184,7 +184,7 @@ public enum GDXAppMain implements DefaultEnumInstanceᴶᴹˣ<GDXAppMain,GDXAppM
 		DeskTopScreen desktop2 = new ScreenDesktop2(this);
 		DeskTopScreen desktop3 = new ScreenDesktop3();
 		DeskTopScreen desktop4 = new ScreenDesktop4();
-		screenMenu = new DeskTopScreenMenu(this, desktop1, desktop2, desktop3, desktop4);
+		screenMenu = new DeskTopScreenMenu(desktop1, desktop2, desktop3, desktop4);
 		
 		putScreen(new ScreenLoading());
 		putScreen(new ScreenIntro());
diff --git a/main-gdxapp/src/main/love/distributedrebirth/gdxapp/desktop/DeskTopScreenMenu.java b/main-gdxapp/src/main/love/distributedrebirth/gdxapp/desktop/DeskTopScreenMenu.java
index 1648816a..e6448cbf 100644
--- a/main-gdxapp/src/main/love/distributedrebirth/gdxapp/desktop/DeskTopScreenMenu.java
+++ b/main-gdxapp/src/main/love/distributedrebirth/gdxapp/desktop/DeskTopScreenMenu.java
@@ -26,7 +26,6 @@ import love.distributedrebirth.gdxapp.screen.ScreenHelp;
 @BãßBȍőnAuthorInfoʸᴰ(name = "willemtsade", copyright = "©Δ∞ 仙上主天")
 public class DeskTopScreenMenu {
 	
-	private final GDXAppMain main;
 	private final DeskTopScreen desktop1;
 	private final DeskTopScreen desktop2;
 	private final DeskTopScreen desktop3;
@@ -35,9 +34,8 @@ public class DeskTopScreenMenu {
 	private ImBoolean fileMinimizeSelected = new ImBoolean(false);
 	private ImBoolean fileCloseSelected = new ImBoolean(false);
 	
-	public DeskTopScreenMenu(final GDXAppMain main, DeskTopScreen desktop1, DeskTopScreen desktop2,
+	public DeskTopScreenMenu(DeskTopScreen desktop1, DeskTopScreen desktop2,
 			DeskTopScreen desktop3, DeskTopScreen desktop4) {
-		this.main = main;
 		this.desktop1 = desktop1;
 		this.desktop2 = desktop2;
 		this.desktop3 = desktop3;
@@ -49,7 +47,7 @@ public class DeskTopScreenMenu {
 		apps.add(new GDXAppLauncher("Base Parts", () -> new SystemBasePartApp()));
 		apps.add(new GDXAppLauncher("Hebrew Wallet", () -> new HebrewWalletApp()));
 		apps.add(new GDXAppLauncher("Unicode4D", () -> new Unicode4DApp()));
-		apps.add(new GDXAppLauncher("Music Player", () -> new MusicPlayerApp(main)));
+		apps.add(new GDXAppLauncher("Music Player", () -> new MusicPlayerApp()));
 	}
 
 	public void renderMenu(DeskTopScreen appScreen) {
@@ -184,12 +182,12 @@ public class DeskTopScreenMenu {
 			}
 			if (ImGui.beginMenu(infix1+"Desktop1")) {
 				if (ImGui.menuItem("Main reality")) {
-					main.selectScreen(ScreenDesktop1.class);
+					GDXAppMain.INSTANCE.selectScreen(ScreenDesktop1.class);
 					desktop1.getDeskAppScreen().setCurrentDeskApp(null);
 				}
 				for (DeskApp app: desktop1.getDeskAppScreen().getDeskApps()) {
 					if (ImGui.menuItem(app.getTitle())) {
-						main.selectScreen(ScreenDesktop1.class);
+						GDXAppMain.INSTANCE.selectScreen(ScreenDesktop1.class);
 						desktop1.getDeskAppScreen().setCurrentDeskApp(app);
 					}
 				}
@@ -197,12 +195,12 @@ public class DeskTopScreenMenu {
 			}
 			if (ImGui.beginMenu(infix2+"Desktop2")) {
 				if (ImGui.menuItem("Main reality")) {
-					main.selectScreen(ScreenDesktop2.class);
+					GDXAppMain.INSTANCE.selectScreen(ScreenDesktop2.class);
 					desktop2.getDeskAppScreen().setCurrentDeskApp(null);
 				}
 				for (DeskApp app: desktop2.getDeskAppScreen().getDeskApps()) {
 					if (ImGui.menuItem(app.getTitle())) {
-						main.selectScreen(ScreenDesktop2.class);
+						GDXAppMain.INSTANCE.selectScreen(ScreenDesktop2.class);
 						desktop2.getDeskAppScreen().setCurrentDeskApp(app);
 					}
 				}
@@ -210,12 +208,12 @@ public class DeskTopScreenMenu {
 			}
 			if (ImGui.beginMenu(infix3+"Desktop3")) {
 				if (ImGui.menuItem("Main reality")) {
-					main.selectScreen(ScreenDesktop3.class);
+					GDXAppMain.INSTANCE.selectScreen(ScreenDesktop3.class);
 					desktop3.getDeskAppScreen().setCurrentDeskApp(null);
 				}
 				for (DeskApp app: desktop3.getDeskAppScreen().getDeskApps()) {
 					if (ImGui.menuItem(app.getTitle())) {
-						main.selectScreen(ScreenDesktop3.class);
+						GDXAppMain.INSTANCE.selectScreen(ScreenDesktop3.class);
 						desktop3.getDeskAppScreen().setCurrentDeskApp(app);
 					}
 				}
@@ -223,12 +221,12 @@ public class DeskTopScreenMenu {
 			}
 			if (ImGui.beginMenu(infix4+"Desktop4")) {
 				if (ImGui.menuItem("Main reality")) {
-					main.selectScreen(ScreenDesktop4.class);
+					GDXAppMain.INSTANCE.selectScreen(ScreenDesktop4.class);
 					desktop4.getDeskAppScreen().setCurrentDeskApp(null);
 				}
 				for (DeskApp app: desktop4.getDeskAppScreen().getDeskApps()) {
 					if (ImGui.menuItem(app.getTitle())) {
-						main.selectScreen(ScreenDesktop4.class);
+						GDXAppMain.INSTANCE.selectScreen(ScreenDesktop4.class);
 						desktop4.getDeskAppScreen().setCurrentDeskApp(app);
 					}
 				}
@@ -248,7 +246,7 @@ public class DeskTopScreenMenu {
 			ImGui.separator();
 			if (Gdx.graphics.isFullscreen()) {
 				if (ImGui.menuItem("Window Mode")) {
-					Gdx.graphics.setWindowedMode(main.viewWidth, main.viewHeight);
+					Gdx.graphics.setWindowedMode(GDXAppMain.INSTANCE.viewWidth, GDXAppMain.INSTANCE.viewHeight);
 				}
 			} else {
 				if (ImGui.menuItem("Full Screen")) {
@@ -257,17 +255,17 @@ public class DeskTopScreenMenu {
 			}
 			ImGui.separator();
 			if (ImGui.menuItem("Credits")) {
-				main.selectScreen(ScreenCredits.class);
+				GDXAppMain.INSTANCE.selectScreen(ScreenCredits.class);
 			}
 			if (ImGui.menuItem("Help")) {
-				main.selectScreen(ScreenHelp.class);
+				GDXAppMain.INSTANCE.selectScreen(ScreenHelp.class);
 			}
 			ImGui.separator();
 			if (ImGui.menuItem("ImGui Demo")) {
-				main.showImGuiDemo.set(true);
+				GDXAppMain.INSTANCE.showImGuiDemo.set(true);
 			}
 			if (ImGui.menuItem("Shutdown")) {
-				main.dispose();
+				GDXAppMain.INSTANCE.dispose();
 				System.exit(0);
 			}
 			ImGui.endMenu();
diff --git a/main-gdxapp/src/main/love/distributedrebirth/gdxapp/desktop/apps/MusicPlayerApp.java b/main-gdxapp/src/main/love/distributedrebirth/gdxapp/desktop/apps/MusicPlayerApp.java
index eee0fbf4..4cf24e16 100644
--- a/main-gdxapp/src/main/love/distributedrebirth/gdxapp/desktop/apps/MusicPlayerApp.java
+++ b/main-gdxapp/src/main/love/distributedrebirth/gdxapp/desktop/apps/MusicPlayerApp.java
@@ -24,10 +24,9 @@ import net.spookygames.gdx.nativefilechooser.NativeFileChooserConfiguration;
 @BãßBȍőnAuthorInfoʸᴰ(name = "willemtsade", copyright = "©Δ∞ 仙上主天")
 public class MusicPlayerApp extends DefaultDeskApp implements DeskAppRenderer {
 
-	private final GDXAppMain main;
 	private final NativeFileChooserConfiguration fileChooserConfig;
 	
-	public MusicPlayerApp(GDXAppMain main) {
+	public MusicPlayerApp() {
 		setTitle("Music Player");
 		getContours().registrateContour(DeskAppContourSection.MAIN, this);
 		getContours().registrateContour(DeskAppContourSection.FILE_NEW, new DeskAppRenderer() {
@@ -35,12 +34,12 @@ public class MusicPlayerApp extends DefaultDeskApp implements DeskAppRenderer {
 			@Override
 			public void render() {
 				if (ImGui.menuItem("Add")) {
-					main.fileChooser.chooseFile(fileChooserConfig, NativeFileChooserCallbackAdapter.onFileChosen(v -> main.music.addBackgroundMusic(v)));
+					GDXAppMain.INSTANCE.fileChooser.chooseFile(fileChooserConfig,
+							NativeFileChooserCallbackAdapter.onFileChosen(v -> GDXAppMain.INSTANCE.music.addBackgroundMusic(v)));
 				}
 			}
 			
 		});
-		this.main = main;
 		fileChooserConfig = new NativeFileChooserConfiguration();
 		fileChooserConfig.directory = Gdx.files.absolute(System.getProperty("user.home"));
 		fileChooserConfig.mimeFilter = "audio/*";
@@ -50,7 +49,7 @@ public class MusicPlayerApp extends DefaultDeskApp implements DeskAppRenderer {
 	@Override
 	public void render() {
 		ImGui.text("Current Song:");
-		MusicSong currentSong = main.music.getCurrentSong();
+		MusicSong currentSong = GDXAppMain.INSTANCE.music.getCurrentSong();
 		if (currentSong != null) {
 			ImGui.sameLine();
 			ImGui.text(currentSong.getName());
@@ -58,22 +57,22 @@ public class MusicPlayerApp extends DefaultDeskApp implements DeskAppRenderer {
 		ImGui.separator();
 		if (currentSong != null) {
 			if (ImGui.button("Play")) {
-				main.music.play(currentSong);
+				GDXAppMain.INSTANCE.music.play(currentSong);
 			}
 		} else {
 			ImGui.text("Play");
 		}
 		ImGui.sameLine();
 		if (ImGui.button("<")) {
-			main.music.prev();
+			GDXAppMain.INSTANCE.music.prev();
 		}
 		ImGui.sameLine();
 		if (ImGui.button(">")) {
-			main.music.next();
+			GDXAppMain.INSTANCE.music.next();
 		}
 		ImGui.sameLine();
 		if (ImGui.button("Stop")) {
-			main.music.stop();
+			GDXAppMain.INSTANCE.music.stop();
 		}
 		int flags = ImGuiTableFlags.ScrollX | ImGuiTableFlags.RowBg | ImGuiTableFlags.BordersOuter | ImGuiTableFlags.BordersV;
 		ImGui.beginTable("playlist", 3, flags);
@@ -82,14 +81,14 @@ public class MusicPlayerApp extends DefaultDeskApp implements DeskAppRenderer {
 		ImGui.tableSetupColumn("Name");
 		ImGui.tableHeadersRow();
 		int i=1;
-		for (MusicSong song:main.music.getBackgroundSongs()) {
+		for (MusicSong song:GDXAppMain.INSTANCE.music.getBackgroundSongs()) {
 			ImGui.pushID(i);
 			ImGui.tableNextRow();
 			ImGui.tableNextColumn();
 			ImGui.selectable(""+i, song.isPlaying(), ImGuiSelectableFlags.None);
 			ImGui.tableNextColumn();
 			if (ImGui.smallButton(">")) {
-				main.music.play(song);
+				GDXAppMain.INSTANCE.music.play(song);
 			}
 			ImGui.tableNextColumn();
 			ImGui.selectable(song.getName(), song.isPlaying(), ImGuiSelectableFlags.None);