Actually make the instance of GraphicsSettings private.

src/de/teamteamteam/spacescooter/Main.java

@@ -25,7 +25,7 @@ public class Main {
 	 * @param args Command line arguments.
 	 */
 	public static void main(String[] args) {
-		final GraphicsSettings gs = GraphicsSettings.instance; // Get settings
+		final GraphicsSettings gs = GraphicsSettings.getInstance(); // Get settings
 
 		// Initialize SuperScreen and add to GameFrame, so we can call doPaint()
 		// on it.

src/de/teamteamteam/spacescooter/utility/GraphicsSettings.java

@@ -44,7 +44,7 @@ public class GraphicsSettings {
 	/**
 	 * Instance holder for GraphicsSettings.
 	 */
-	public static GraphicsSettings instance;
+	private static GraphicsSettings instance;
 	
 	
 	/**
@@ -124,4 +124,10 @@ public class GraphicsSettings {
 		return compatibleImage;
 	}
 	
+	/**
+	 * Get the instance of GraphicsSettings
+	 */
+	public static GraphicsSettings getInstance() {
+		return GraphicsSettings.instance;
+	}
 }

src/de/teamteamteam/spacescooter/utility/Loader.java

@@ -185,10 +185,10 @@ public class Loader {
 	 * current ScreenDevice.
 	 */
 	private static BufferedImage createCompatibleImage(BufferedImage storedImage) {
-		if(GraphicsSettings.instance.getColorModel().equals(storedImage.getColorModel())) {
+		if(GraphicsSettings.getInstance().getColorModel().equals(storedImage.getColorModel())) {
 			return storedImage;
 		} else {
-			return GraphicsSettings.instance.createCompatibleBufferedImage(storedImage);
+			return GraphicsSettings.getInstance().createCompatibleBufferedImage(storedImage);
 		}
 	}