Follow the person who guides you, remember the stones she stepped, and control the arrow keys to step on the stones.
This is a game that tests the players instant memorizing. In the game, the player plays a traveler blocked by the river. Fortunately, there is a person in front of you who guides you. She knows which stones are safe. You need to observe and remember the stones she stepped on. After she successfully crosses the river, you can operate the arrow keys and step on the safe stones to reach the opposite bank to get the trophy. If you step on a fragile stone you will fall into the water.