Enter these items in the appropriate order at the password screen to unlock the corresponding level: 2: Dice, Bone, Bone, Dice 3: Dice, Key, Bone, Machine 4: Dice, Bone, Food Bowl, Toy 5: Bone, Dice, Dog, Bone 6: Bone, Dice, Machine, Food Bowl 7: Bone, Bone, Paw, Dog 8: Bone, Bone, Paw, Toy 9: Bone, Toy, Key, Bone 10: Bone, Toy, Key, Dice 11: Bone, Toy, Bone, Machine 12: Bone, Machine, Dice, Toy 13: Bone, Machine, Toy, Key 14: Bone, Toy, Paw, Food Bowl 15: Bone, Toy, Toy, Machine 16: Bone, Paw, Toy, Toy 17: Toy, Bone, Key, Bone Bonus Level 1: Machine, Dice, Dice, Dice Bonus Level 2: Machine, Dice, Dice, Machine