fix: grid issues

memory-game/components/MemoryGame.jsx

@@ -22,12 +22,12 @@ const MemoryGame = () => {
 
   const [won, setWon] = useState(false);
 
-  const handleGridSize = (e) => {
-    const size = parseInt(e.target.value);
-    if (2 <= size && size <= 10) {
-      setGridSize(size);
-    }
-  };
+const handleGridSize = (e) => {
+  const size = parseInt(e.target.value);
+  if (2 <= size && size <= 10 && (size * size) % 2 === 0) {
+    setGridSize(size);
+  }
+};
 
   const initializeGame = useCallback(() => {
     const totalCards = gridSize * gridSize;