Update

.idea/hellsgamers.iml

@@ -7,8 +7,6 @@
       <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/src/main" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/test" isTestSource="false" />
       <excludeFolder url="file://$MODULE_DIR$/target" />
     </content>

src/main/java/MenuFrame.java

@@ -1,2 +1,12 @@
-public class MenuFrame {
+import javax.swing.*;
+
+public class MenuFrame extends JFrame {
+    
+    MenuPanel panel;
+
+    public MenuFrame() {
+        panel = new MenuPanel();
+        this.add(panel);
+        this.setTitle("Main Menu for Ping-Pong");
+        this.setResizable(false);
 }

src/main/java/MenuPanel.java

@@ -0,0 +1,2 @@
+public class MenuPanel {
+}