If you need help with the secrets, in this post you will find the location of the 5 secrets in level 4. If you don’t want to be spoiled, you should stop reading now.
Secret 1 – Just before meeting the hamster
Secret 2 – Over the bird house, after running away from the hamster
Secret 3 – In a cave, after finding a can
Secret 5 – In the emptied firewood box