Items - In the Items category, you can purchase useful consumables like Health Potions, which are highly recommended to buy before leaving the village, as they can significantly aid your progress. Be sure to review the effects of each item before making a purchase to ensure it suits your needs. 

To buy an item, select it and press the "Buy" button to proceed with the purchase confirmation. 

Keep in mind that after clearing a stage, any remaining items will be exchanged for coins at half their shop price.

Buddy Parts - In the Buddy Parts category, you can purchase parts that come with various skills. The "Auto Recovery" skill is especially useful and highly recommended. There are many other powerful skills to explore, so give them a try! Once you've purchased skills, equip them at the Craft House. Be careful not to buy duplicates of skills you already own. 

You can also use the “Sell Parts” button to sell any excess parts for additional coins.