向后移动bug

src/components/blockly/MapGame.vue

@@ -852,9 +852,9 @@ window.moveBackward = async function(stepCount = 1) {
 
     // 根据当前方向计算新位置（向后移动）
     switch(playerDirection.value) {
-      case CONFIG.GAME.DIRECTIONS.UP: newY--; break;
+      case CONFIG.GAME.DIRECTIONS.UP: newY++; break;
       case CONFIG.GAME.DIRECTIONS.RIGHT: newX--; break;
-      case CONFIG.GAME.DIRECTIONS.DOWN: newY++; break;
+      case CONFIG.GAME.DIRECTIONS.DOWN: newY--; break;
       case CONFIG.GAME.DIRECTIONS.LEFT: newX++; break;
     }