Add CreateNewGameFrame class.

src/CreateNewGameFrame.java

+import javax.swing.*;
+import java.awt.*;
+
+public class CreateNewGameFrame extends JFrame {
+    private JPanel settingPanel;
+    private JPanel gameDetailsPanel;
+    private JPanel optionPanel;
+    private JTextField gameNameText;
+    private JComboBox gameFinishMode;
+    private JComboBox playerNumber;
+    private JComboBox gameMode;
+    private JButton okButton;
+    private JSlider tankHealthSlider;
+    private JSlider shotDamageSlider;
+    private JSlider destructibleWallSlider;
+    private String gameDetails = "";
+
+    public CreateNewGameFrame(String title) {
+
+        super(title);
+        setBackground(Color.WHITE);
+        setResizable(false);
+        setLayout(new GridLayout(1, 2));
+        setBounds(600, 200, 500, 570);
+        initSettingPanel();
+        initNewGame();
+
+        setVisible(true);
+
+    }
+
+}