adjusted winningpanel format

src/main/java/Gui/GameGui.java

@@ -45,10 +45,14 @@ GridBagConstraints gbc;
 	public void createWinningPanel() {
 		GameGui.MainPanel.setVisible(false);
 		GameGui.ButtonPanel.setVisible(false);
-		WinningPanel = new JPanel();
+		WinningPanel = new JPanel(new GridLayout());
 		WinningLabel = new JLabel("Du hast Gewonnen!");
+		WinningLabel.setVerticalAlignment(JLabel.CENTER);
+		WinningLabel.setHorizontalAlignment(JLabel.CENTER);
+		WinningLabel.setFont(new Font("Serif", Font.BOLD, 28));
 		WinningPanel.add(WinningLabel);
         gui.Frame.add(WinningPanel);
+        WinningPanel.setVisible(true);
 	}