Only now a 30% discount for purchase a steam-key on the developer's website:
Purchase on Steam:
Fool's Chest last day available in the game store
The Fool’s Chest is guaranteed to contain one of the existing hats in the game (which are 33!), and the crafts hat will always have the top 150% quality.
Try your luck! In the Fool's Chest, there are 2 unique hats: Witch’s Hat, Pumpkin Helmet.