It can be played with difficulty level 1 alone or played with difficulty level 1 and 2. Gameplay of level 1: add the dog kibbles into 8 barns around the toy, 6 flip type barns and 2 slide type barns. Guide the dog to flip or slide the lid of different barns on the food plate with his paw or nose, and he can get food reward by playing with the toy. Gameplay of level 2: the dog needs to press the transparent granary cover first, and kibbles will leak out of the granary into 6 barns around the granary, and the dog needs to flip the lid to get the food.