Flash an X instead of a status window when the user inputs the wrong answer

package.json

@@ -58,6 +58,13 @@
               "spaceOptimization": "storage",
               "type": "bitmap"
           },
+          {
+              "file": "x.png",
+              "memoryFormat": "Smallest",
+              "name": "X",
+              "spaceOptimization": "storage",
+              "type": "bitmap"
+          },
           {
               "file": "check.png",
               "memoryFormat": "Smallest",