fix switch case

src/Fenster.java

@@ -153,6 +153,7 @@ public class Fenster extends PApplet {
             case 'w':
                 // code block
                 dead();
+                break;
             case 'u':
                 // code block
                 try {
@@ -161,6 +162,7 @@ public class Fenster extends PApplet {
                     throw new RuntimeException(e);
                 }
                 exit();
+                break;
         }
         startScreen.keyPressed();
         gameScreen.keyPressed();