While solving this puzzle, in general, we make way by moving other tiles while trying to ‘take‘ the tile 1 to the 1st position and then tile 2 to second position and so on. Having the timer is running and the number of the steps being counted, this is not good way of problem solving. So, you have to pay penalty :). I will explain the penalty in another post.
And, I gave the app a kind of intelligence by developing an engine* to see your aggressiveness and the deviation (calculated from your moves) from the best projected solution. So, to avoid the penalty mind the attitude of the game and mind your moves.
* Improvements are coming.