new folder structure and changes in module-info.java

src/main/java/module-info.java

@@ -3,8 +3,15 @@ module gui {
     requires javafx.fxml;
     requires org.apache.logging.log4j;
 
-    opens org.example to javafx.fxml;
-    exports org.example;
-    exports org.example.game;
-    opens org.example.game to javafx.fxml;
+    opens org.example.StartScreen to javafx.fxml;
+    exports org.example.StartScreen;
+
+    opens org.example.OptionsScreen to javafx.fxml;
+    exports org.example.OptionsScreen;
+
+    opens org.example.SnakeGame to javafx.fxml;
+    exports org.example.SnakeGame;
+
+
+
 }
\ No newline at end of file

src/main/java/org/example/game/OptionsScreen.java → src/main/java/org/example/OptionsScreen/OptionsScreen.java

-package org.example.game;
+package org.example.OptionsScreen;
+
+
 
 public class OptionsScreen {
+
+
+
+
 }

src/main/java/org/example/game/SnakeGame.java → src/main/java/org/example/SnakeGame/SnakeGame.java

-package org.example.game;
+package org.example.SnakeGame;
 
 import javafx.application.Application;
 import javafx.scene.Scene;

src/main/java/org/example/StartScreen/StartSceneController.java

+package org.example.StartScreen;
+
+import javafx.event.ActionEvent;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Node;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.stage.Stage;
+
+import java.io.IOException;
+
+public class StartSceneController {
+
+    private Stage stage;
+    private Scene scene;
+    private Parent root;
+
+    public void switchToOptions(ActionEvent event) throws IOException {
+        root = FXMLLoader.load(getClass().getResource("/fxml/start.fxml"));
+        stage = (Stage)((Node)event.getSource()).getScene().getWindow();
+        scene = new Scene(root);
+        stage.setScene(scene);
+        stage.show();
+    }
+}

src/main/java/org/example/game/StartScreen.java → src/main/java/org/example/StartScreen/StartScreen.java

-package org.example.game;
+package org.example.StartScreen;
 
 import javafx.application.Application;
 import javafx.fxml.FXMLLoader;
@@ -12,11 +12,18 @@ import org.apache.logging.log4j.Logger;
 public class StartScreen extends Application {
         private final static Logger logger = LogManager.getLogger(StartScreen.class);
 
+        private static Stage stages;
+        private final static double WITDH = 600;
+        private final static double HEIGHT = 500;
+
+
         public static void main(String[] args) {
             logger.info("Startscene is activated");
             launch(args);
          }
 
+
+
         @Override
         public void start(Stage startstage) throws Exception{
             Parent root = FXMLLoader.load(getClass().getResource("/fxml/start.fxml"));