补充十字方块、黑洞和空中换形强化

src/source/Tetris.cpp

@@ -435,9 +435,15 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
         case VK_SHIFT:
             HoldCurrentPiece();
             break;
+        case 'Z':
+            UseBlackHole();
+            break;
         case 'X':
             UseScreenBomb();
             break;
+        case 'V':
+            UseAirReshape();
+            break;
         default:
             break;
         }