add ActionListener to Start Button

src/main/java/Gui/StartGameGui.java

@@ -0,0 +1,15 @@
+package Gui;
+
+import java.awt.Color;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+
+public class StartGameGui implements ActionListener {
+
+	@Override
+	public void actionPerformed(ActionEvent e) {
+		gui.Panel.setVisible(false);
+	}
+
+}

src/main/java/Gui/gui.java

@@ -32,6 +32,7 @@ public class gui {
 	    
 		public void createButtons() {
 			StartBtn = new JButton("Starte Spiel");
+			StartBtn.addActionListener(new StartGameGui());
 			CloseBtn = new JButton("Schlieen");
 			CloseBtn.addActionListener(new ActionHandler());