Quite good.
I like the games's concept, design and the minimum number of moves to aim for. And the puzzles are cleverly designed. But I have a few quibbles. Firstly the controls - moving the block and the board by swiping too easily overlap, causing some frustration. Secondly if the block goes the wrong direction that you wanted, it counts as a move and you can't undo. So when the controls aren't accurate enough and you're trying to get the minimum moves, one error means you must start again. Lastly the ads. Now I know it's free so some ads is fine, but I don't like putting up with 30sec video ads. One last thing is that it's not always clear and easy to see the target destination - the yellow area. Anyway, thanks developers as on the whole I am enjoying playing your app.