Simple game, somewhat frustrating to play

While the game is basic and simple, actually playing it can be frustrating because the accuracy for touch to grab and move pieces is quite poor. If you place a piece and then want to move it, it isnt easy to "grab" the piece you intend if there are other pieces adjacent to it on the board. I would also like to see a "undo" type of button that would go back one placement / step at a time.

ember1205 about Montezuma Puzzle 4 Premium, v1.0.0