1. Using the hammer, press the pumpkins in the correct order. The order has to do with the age of the pumpkins. Press the pumpkin with the most lines first, and the one with the least lines last.
The order changes every time you play this level.
If you press it in the wrong order, the cracks will reset.
Just remember which ones you hit.
2. It should look like the picture above when you h ave all but the last one.
(the above picture isn't necessarily how your game will look like because it changes)