Simple and interesting Game, though there's a visual bug where misplaced items are duplicated and are only removed when the game starts over. If you're quick to drag & return back said duplicate, it will freeze in place and probably block the view of the item behind it? This can be avoided by not picking up the duplicate, it will disappear on its own in a few seconds...

However, it occasionally gets confusing to know which misplaced items are dupes if the same items that are beside each other become so.