You’re in a park.
Use the door of the small tent to talk to the man inside. Ask him where you are and he’ll explain the situation. When you ask him for help to get you out, he’ll give you a ROPE.
Use your hands in the river to find a HOOK. Use the hook with the rope and with the combination, fidh in the river. You’ll find more ROPE. Use the long rope on the hole to climb down to the light and correct your mistake.
Game source: A copy of the game was found here on the internet.