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assign3.md

@@ -218,7 +218,7 @@ Implement tile animation entirely in your `BoardView` class:
 view controller removes the `ButtonTile` from the board.
 
 ## Task 5: Gestures
-Add gestures to the board. The gesture recognizer use your
+Add up, down, left, and right swipe gestures to the board. The gesture recognizer use your
 game's view controller as a target (first parameter to the
 `UISwipeGestureRecognizer` initializer), but you can attach this either to
 view controller's view, or to the game board. Either works.